Τώρα θέλω λίγη ησυχία για να συγκεντρωθώ.

Because the verb already tells you the subject.

θέλω means I want, so Greek normally leaves out the subject pronoun unless it is needed for emphasis, contrast, or clarity.

• Τώρα θέλω λίγη ησυχία... = Now I want some quiet...
• Εγώ θέλω λίγη ησυχία... = I want some quiet... with extra emphasis on I

This is very common in Greek.

Because λίγος / λίγη / λίγο changes form to match the noun it goes with.

Here the noun is ησυχία, which is:

• feminine
• singular
• accusative (because it is the direct object of θέλω)

So the correct form is λίγη.

Compare:

• λίγη ησυχία = a little quiet
• λίγο νερό = a little water
• λίγος χρόνος = a little time

English speakers often learn λίγο first because it is also used as an adverb, but here you need the agreeing adjective form λίγη.

It is in the accusative singular, because it is the direct object of θέλω.

You are wanting what?
→ λίγη ησυχία

So:

• θέλω = I want
• λίγη ησυχία = some quiet

A useful detail: with many feminine nouns like ησυχία, the nominative and accusative singular look the same, so the form does not visibly change.

Because Greek often does not use an article with quantity words like λίγη, πολλή, αρκετή, etc.

So λίγη ησυχία naturally means:

• a little quiet
• some quiet
• a bit of peace and quiet

Using an article here would not sound natural in the same way. The phrase works as an indefinite quantity expression on its own.

ησυχία basically means quiet, silence, or peace and quiet, depending on context.

In this sentence, it is not just literal silence in a strict sense. It can also mean:

• no noise
• no interruptions
• being left in peace so you can focus

So λίγη ησυχία is a very natural way to say something like some peace and quiet.

Because Modern Greek usually does not use an infinitive the way English does.

Where English says:

• to concentrate
• to go
• to see

Modern Greek usually uses να + a finite verb form.

So instead of an infinitive, Greek says:

• να συγκεντρωθώ = that I concentrate / for me to concentrate
• να πάω = to go
• να δω = to see

In this sentence, the purpose is expressed as:

• για να συγκεντρωθώ = so that I can concentrate / in order to concentrate

για να introduces a purpose clause. It means:

• so that
• in order to
• so as to

So:

• Θέλω λίγη ησυχία για να συγκεντρωθώ. = I want some quiet so that I can concentrate.

This is a very common Greek pattern:

• Πήγα νωρίς για να τον δω. = I went early to see him.
• Κλείσε την πόρτα για να μην ακούγεται θόρυβος. = Close the door so that no noise is heard.

It comes from the verb συγκεντρώνομαι, which means I concentrate / I focus.

The form συγκεντρωθώ is the 1st person singular aorist subjunctive form, used here after για να.

So:

• συγκεντρώνομαι = I concentrate / I am concentrating
• να συγκεντρωθώ = to concentrate / so that I can concentrate

A very important point for English speakers: although this form looks like a passive-type form, its meaning here is not passive in English. Greek often uses middle/passive verb forms for actions that English expresses with an ordinary active verb.

Also compare:

• συγκεντρώνω = I gather / collect / concentrate something
• συγκεντρώνομαι = I gather myself / focus / concentrate

So in this sentence, συγκεντρωθώ means focus/concentrate, not be concentrated.

Because after για να, Greek often uses the aorist subjunctive when the idea is achieving a result or completing an action.

Here the meaning is roughly:

• I want some quiet so that I can focus
• I want some quiet in order to get myself concentrated

That is why να συγκεντρωθώ sounds natural.

If you used a present-type form such as να συγκεντρώνομαι, it would suggest more of an ongoing or repeated process, which is less natural in this sentence.

Yes, but it means something different.

• Τώρα θέλω λίγη ησυχία για να συγκεντρωθώ. = Now I want some quiet so that I can concentrate.

• Τώρα θέλω να συγκεντρωθώ. = Now I want to concentrate.

In the original sentence, the thing you want is λίγη ησυχία.
In the second sentence, the thing you want is the action of concentrating.

So both are correct, but they are not the same statement.

Greek word order is fairly flexible, and starting with Τώρα is natural.

Placing Τώρα first gives it clear prominence:

• Τώρα θέλω λίγη ησυχία... = Now I want some quiet...

This can sound like:

• at this moment
• right now
• not later
• this is what I need now

Other word orders are possible, but they change the emphasis a little:

• Θέλω τώρα λίγη ησυχία.
• Λίγη ησυχία θέλω τώρα.

The original order is the most neutral and natural if you want to stress now at the beginning.

It is completely natural Greek.

A native speaker could easily say:

• Τώρα θέλω λίγη ησυχία.
• Θέλω λίγη ησυχία για να συγκεντρωθώ.
• Τώρα θέλω λίγη ησυχία για να συγκεντρωθώ.

It sounds like something someone would say when they need quiet to work, study, read, or think. The structure, vocabulary, and phrasing are all idiomatic.