Я трохи втомився після роботи.

Both are possible in Ukrainian, but they mean slightly different things.

• Я трохи втомився = I got a little tired / I’m a little tired
• Я трохи втомлений = I am a little tired using an adjective

In your sentence, втомився is a past-tense verb from втомитися (to get tired). Ukrainian often uses this kind of verb where English might prefer to be tired.

So the sentence literally feels more like:

• I got a bit tired after work

But in natural English, it is often translated simply as:

• I’m a bit tired after work

The -ся is a very common Ukrainian verb ending, often called the reflexive marker.

The base verb is:

• втомити = to tire someone/something

And the reflexive form is:

• втомитися = to get tired

So:

• Я втомився = I got tired

In this sentence, -ся does not really mean myself in the English sense. It is just part of the normal verb form.

Yes. In the past tense, Ukrainian verbs agree with the speaker’s gender and number.

Here are the forms:

• Я втомився — said by a man
• Я втомилася — said by a woman
• Ми втомилися — we got tired / we are tired

So your sentence is the version a male speaker would say.

Because the preposition після (after) requires the genitive case.

The noun is:

• робота = work, job

Its genitive singular form is:

• роботи

So:

• після роботи = after work

This is something you simply have to learn with the preposition:

• після + genitive

Трохи means:

• a little
• a bit
• somewhat

So:

• Я трохи втомився = I’m a little tired / I got a bit tired

It softens the statement, just like a little or a bit in English.

You may also hear:

• трошки — a very common, more conversational variant of трохи

Yes, very often.

Because втомився already shows 1st person singular and the speaker’s gender, Ukrainian does not always need the pronoun.

So both are natural:

• Я трохи втомився після роботи.
• Трохи втомився після роботи.

Including Я can make the subject a little more explicit or emphatic.

No, Ukrainian word order is fairly flexible.

The most neutral version is:

• Я трохи втомився після роботи.

But other orders are possible, depending on emphasis:

• Після роботи я трохи втомився. — emphasizes after work
• Я після роботи трохи втомився. — also natural
• Трохи я втомився після роботи. — possible, but less neutral

So word order in Ukrainian often reflects focus and emphasis, not just grammar.

This is a very common thing for English speakers to notice.

Втомився is grammatically a past-tense verb, literally something like:

• got tired

But Ukrainian often uses this form to express a resulting state that still matters now.

So depending on context, Я трохи втомився після роботи can feel like:

• I got a little tired after work
• I’m a little tired after work

English and Ukrainian do not always package this idea in the same way.

Yes, you could, and it would be understood.

• втомився is the most common everyday choice
• стомився also means got tired, but can sound a bit more literary or stylistically marked depending on context

For most learners, втомився is the safer and more useful everyday word.

You would change the past-tense verb ending:

• Я трохи втомилася після роботи.

That is the feminine form.

So:

• втомився — masculine
• втомилася — feminine

Everything else stays the same.