El ruido de la obra hace que me cueste concentrarme, así que hoy estudiaré en la biblioteca.

Here la obra means construction work or building work. In Spain, obra is very commonly used for things like renovations, roadworks, or construction happening nearby.

So el ruido de la obra means:

• the noise from the construction
• the noise from the building work

This is a very common Spain-Spanish use of obra.

Examples:

• Hay obras en mi calle. = There’s construction on my street.
• El piso está en obras. = The flat/apartment is being renovated.

De la obra refers to a specific source of noise: the construction work that both speaker and listener can identify from context.

So:

• el ruido de la obra = the noise from the construction
• literally, the noise of the construction work

Using la makes it sound concrete and specific.

In Spanish, this is very natural when talking about something known in the situation:

• el ruido del tráfico = the noise from traffic
• el olor de la comida = the smell of the food
• el polvo de la obra = the dust from the construction work

Hacer que is a very common structure meaning to make someone do something, to cause something, or to bring about an effect.

Here:

• El ruido de la obra hace que... = The noise from the construction makes it so that...
• more naturally in English: The noise from the construction makes it hard for me...

So the structure is:

[cause] + hace que + [new clause]

In this sentence:

• cause = El ruido de la obra
• effect = me cueste concentrarme

Because hacer que is normally followed by the subjunctive when it introduces a new clause with a different subject.

So:

• hace que me cueste uses the subjunctive
• cueste is the present subjunctive of costar

This is one of the most important patterns to learn:

• Eso hace que esté cansado. = That makes me tired.
• La lluvia hace que el viaje sea más difícil. = The rain makes the trip more difficult.

Why subjunctive here? Because the sentence is presenting the result/effect caused by something, not just stating a simple fact in an independent clause.

Literally, it means something like:

it costs me to concentrate

But in natural English, it means:

• it’s hard for me to concentrate
• I find it difficult to concentrate

The verb costar is often used like this in Spanish:

• Me cuesta estudiar por la noche. = I find it hard to study at night.
• Le cuesta hablar en público. = He/She finds it hard to speak in public.

So in your sentence:

• me = for me / to me
• cueste = is difficult / costs
• concentrarme = to concentrate

Together: makes it hard for me to concentrate

The me shows who finds it difficult.

Compare:

• Me cuesta = It’s hard for me
• Te cuesta = It’s hard for you
• Le cuesta = It’s hard for him/her

Examples:

• Me cuesta madrugar. = I find getting up early difficult.
• Nos cuesta entenderlo. = We find it hard to understand it.

So in hace que me cueste concentrarme, the speaker is saying that the noise makes concentrating difficult for them.

Because the verb is usually concentrarse, which is a pronominal/reflexive verb meaning to concentrate.

So:

• concentrarse = to concentrate
• concentrarme = to concentrate myself / to concentrate

After another conjugated verb, Spanish often attaches the pronoun to the infinitive:

• Quiero ducharme. = I want to shower.
• Necesito acostarme. = I need to go to bed.
• Me cuesta concentrarme. = I find it hard to concentrate.

You could also place the pronoun before a conjugated verb in some structures, but with an infinitive like this, attaching it to the end is the normal choice.

Normally, no. Concentrar without the reflexive pronoun usually means to concentrate something rather than to concentrate oneself.

For example:

• concentrar la atención = to focus attention
• concentrar recursos = to concentrate resources

But when you mean to focus / to concentrate as a person, Spanish usually uses concentrarse:

• No puedo concentrarme. = I can’t concentrate.
• Me cuesta concentrarme. = It’s hard for me to concentrate.

So concentrarme is the natural form here.

Así que means so, therefore, or as a result.

It connects the first idea to the consequence:

• El ruido de la obra hace que me cueste concentrarme
  = The construction noise makes it hard for me to concentrate

• así que hoy estudiaré en la biblioteca
  = so today I’ll study in the library

It is a very common connector in everyday Spanish.

Similar connectors:

• por eso = for that reason / that’s why
• entonces = then / so
• por lo tanto = therefore (more formal)

Here así que sounds very natural and conversational.

Estudiaré is the simple future of estudiar:

• yo estudiaré = I will study

The speaker is talking about a decision or plan for later today:

• so today I’ll study in the library

Spanish often uses the future tense for this, just like English uses will.

That said, other forms would also be possible:

• voy a estudiar en la biblioteca = I’m going to study in the library
• estudio en la biblioteca hoy = I’m studying in the library today

But estudiaré is perfectly natural and slightly more straightforward as a statement of future action.

Yes. Both are correct, but the nuance is slightly different.

• estudiaré = I will study
• voy a estudiar = I’m going to study

In everyday speech, voy a + infinitive is extremely common and often sounds a bit more immediate or conversational.

So these are both natural:

• Así que hoy estudiaré en la biblioteca.
• Así que hoy voy a estudiar en la biblioteca.

Neither is wrong. The original sentence is just a bit more compact.

Because en expresses where the studying will happen.

• estudiar en la biblioteca = to study in the library

If you said a la biblioteca, that would suggest movement toward the library, usually with a verb like ir:

• Voy a la biblioteca. = I’m going to the library.

So:

• estudiaré en la biblioteca = I’ll study in the library
• iré a la biblioteca = I’ll go to the library

The sentence focuses on the place where the studying happens, not just the destination.

Yes. In the first part, El ruido de la obra is the subject.

Breakdown:

• El ruido de la obra = subject
• hace = verb
• que me cueste concentrarme = subordinate clause showing the effect

So literally:

• The noise from the construction causes that it be difficult for me to concentrate

Natural English:

• The noise from the construction makes it hard for me to concentrate

Then the second part:

• así que hoy estudiaré en la biblioteca
• (yo) estudiaré = main verb, with yo understood
• hoy = today
• en la biblioteca = in the library

Not very naturally. A close literal version would be:

The noise from the construction makes that it be difficult for me to concentrate, so today I will study in the library.

That sounds unnatural in English. A better translation is:

• The noise from the construction makes it hard for me to concentrate, so today I’ll study in the library.
• The construction noise makes it difficult for me to concentrate, so today I’m going to study in the library.

This is a good example of how Spanish and English often express the same idea with different structures.

Yes, very natural.

Especially natural Spain-Spanish features here include:

• la obra meaning nearby construction work
• the use of hacer que + subjunctive
• así que as a common connector
• estudiaré as a normal future form

A native speaker in Spain could easily say this in everyday conversation.

You might also hear variations like:

• Con el ruido de la obra, me cuesta concentrarme, así que hoy estudiaré en la biblioteca.
• El ruido de las obras hace que no pueda concentrarme, así que hoy voy a estudiar a la biblioteca / en la biblioteca.

But the original sentence is fully natural and correct.