Я хочу відпочити, проте мені треба прибрати кімнату.

Because треба is usually used in an impersonal construction in Ukrainian.

So instead of saying something like I need, Ukrainian often says something closer to to me it is necessary:

• мені треба = I need
• literally: to me [it is] necessary

That is why мені is in the dative case.

Compare:

• Я хочу відпочити = I want to rest
• Мені треба прибрати кімнату = I need to clean the room

With хочу, the subject is straightforward, so я is used. With треба, Ukrainian normally uses the dative person: мені, тобі, йому, їй, нам, вам, їм.

They are both infinitives.

In English, infinitives are forms like to rest, to clean.
In Ukrainian, infinitives usually end in -ти, as in:

• відпочити = to rest
• прибрати = to tidy up / to clean up

They appear here because:

• хочу відпочити = want to rest
• треба прибрати = need to clean

So the pattern is:

• хотіти + infinitive
• треба + infinitive

Because кімнату is the accusative singular form, used for a direct object.

The noun is:

• кімната = room (nominative singular)

But in this sentence, the room is the thing being cleaned, so it becomes the direct object:

• прибрати кімнату = to clean the room

For many feminine nouns ending in -а, the accusative singular changes to -у:

• кімната → кімнату
• книга → книгу
• машина → машину

So кімнату is exactly what you would expect after a verb like прибрати.

Both can mean but, but проте is a bit more formal or literary than але.

So:

• але = the most common everyday but
• проте = however / but / nevertheless, slightly more formal or emphatic

Your sentence could also be:

• Я хочу відпочити, але мені треба прибрати кімнату.

That would sound very natural in everyday speech.

Проте is still correct and natural, just a little more polished in tone.

Because проте connects two clauses, and in Ukrainian that kind of conjunction is normally preceded by a comma.

The two parts are:

• Я хочу відпочити
• проте мені треба прибрати кімнату

So the comma works much like in English:

• I want to rest, but I need to clean the room.

This is standard punctuation in Ukrainian.

This is a question of aspect, which is very important in Ukrainian verbs.

• прибирати = to clean / to be cleaning / to clean regularly
  imperfective
• прибрати = to clean up / to finish cleaning / to tidy up
  perfective

In this sentence, прибрати suggests a completed task: the speaker needs to get the room cleaned.

So:

• мені треба прибрати кімнату = I need to clean the room (get it done)

If you used прибирати, it would sound more like the process or general activity:

• мені треба прибирати кімнату = I need to be cleaning the room / I need to clean the room regularly, depending on context

In this sentence, прибрати is the most natural choice.

Again, this is aspect.

• відпочивати = imperfective, to rest, as a process or repeated activity
• відпочити = perfective, to have a rest / to rest for a while and reach that result

In this sentence:

• Я хочу відпочити = I want to rest / have a rest

This sounds like the speaker wants to take a break and feel rested.

If you said:

• Я хочу відпочивати

that would sound more like I want to be resting or I want to spend time resting, which is less natural in this context.

So відпочити is the usual choice here.

Yes, often it can.

Ukrainian frequently drops subject pronouns when the verb already shows the person clearly.

So both are possible:

• Я хочу відпочити, проте мені треба прибрати кімнату.
• Хочу відпочити, проте мені треба прибрати кімнату.

The second version is also natural, because хочу already tells us it is I.

However, keeping я can add clarity, emphasis, or simply sound a little more explicit.

Yes, you can, and it is natural in conversation.

• Я хочу відпочити, але треба прибрати кімнату.

This means roughly:

• I want to rest, but the room needs to be cleaned / but I need to clean the room

Even without мені, the meaning is usually understood from context.

Still, мені треба is clearer if you want to emphasize that I am the one who has to do it:

• але мені треба прибрати кімнату = but I need to clean the room

So both are possible, but the version with мені is more explicit.

They are related, but not identical.

1. треба

Very common, neutral, everyday way to say need to / have to.

• Мені треба прибрати кімнату.

2. потрібно

Also means necessary / need to, often a little more formal or neutral.

• Мені потрібно прибрати кімнату.

This is very close in meaning to мені треба прибрати кімнату.

3. мусити

Means must / have to, often stronger.

• Я мушу прибрати кімнату.

This sounds more forceful than мені треба.

So in your sentence, треба is a very natural and common choice.

Yes. Ukrainian word order is more flexible than English word order, although not completely free.

The basic sentence:

• Я хочу відпочити, проте мені треба прибрати кімнату.

Possible variations include:

• Проте мені треба прибрати кімнату, а я хочу відпочити.
• Я хочу відпочити, проте прибрати кімнату мені треба.

These variations can change the emphasis.

For example:

• мені треба прибрати кімнату = neutral
• прибрати кімнату мені треба = stronger emphasis on clean the room

So yes, word order can shift, but the original version is the most straightforward and natural for a learner.

It can mean either, depending on context.

The verb прибрати often means:

• tidy up
• clean up
• put in order

So прибрати кімнату may refer to:

• picking things up
• making the room neat
• doing basic cleaning

If you want to emphasize actual washing or scrubbing, Ukrainian might use more specific verbs, such as:

• почистити
• вимити
• помити

But in normal everyday speech, прибрати кімнату is a very common way to say clean/tidy the room.

A very everyday version would be:

• Я хочу відпочити, але мені треба прибрати кімнату.

This is almost the same sentence, but але is more common than проте in casual speech.

You could also hear:

• Хочу відпочити, але мені треба прибрати кімнату.
• Я хочу відпочити, але треба прибрати кімнату.

All of these are natural. Your original sentence is correct; it just sounds a little more polished because of проте.