Дома я сразу сняла куртку, надела тёплую кофту и села пить чай.

Here дома means at home.

For learners, this is confusing because дома can also mean houses in other contexts. In this sentence, though, it is an adverbial word meaning at home, not a plural noun.

So:

• Дома я сразу сняла куртку... = At home, I immediately took off my jacket...

A useful note:

• до́ма = at home
• дома́ = houses

In normal writing, Russian usually does not mark stress, so you understand it from context.

Because the speaker is female.

In the Russian past tense, verbs agree with gender and number:

• masculine: снял, надел, сел
• feminine: сняла, надела, села
• neuter: сняло
• plural: сняли

So я сняла means I took off said by a woman.

This is very different from English: in Russian past tense, the verb does not show person (I/you/he) but it does show gender in the singular.

It could be left out in some contexts, but here я is natural and clear.

Russian often drops subject pronouns when the subject is obvious from context. However, in the past tense, the verb itself does not show person clearly. For example, сняла only tells you:

• singular
• feminine
• past tense

It does not tell you whether it means I, you, or she. So я helps identify the subject directly.

Because the sentence describes a sequence of completed actions.

The speaker:

1. took off the jacket,
2. put on a warm sweater,
3. sat down to drink tea.

Perfective verbs are commonly used for single, completed events in a chain like this.

Compare:

• сняла = took off / removed completely
• надела = put on
• села = sat down

If imperfective verbs were used instead, the focus would be more on the process, repetition, or background action, not on completed steps in a sequence.

Both куртку and кофту are in the accusative case because they are direct objects.

The verbs снять and надеть act on something:

• take off what? → куртку
• put on what? → кофту

So:

• куртка → куртку
• кофта → кофту

Both are feminine singular nouns, and in the accusative singular they take -у.

Because the adjective must match the noun in case, gender, and number.

Since кофту is:

• feminine
• singular
• accusative

the adjective must also be feminine singular accusative:

• тёплая кофта = a warm sweater/blouse (nominative)
• надела тёплую кофту = put on a warm sweater/blouse (accusative)

So тёплую agrees with кофту.

This is a very common question.

In standard Russian:

• надеть = to put on something
• одеть = to dress someone

So:

• надеть кофту / куртку / шапку = to put on a sweater / jacket / hat
• одеть ребёнка = to dress a child

That is why надела тёплую кофту is correct here: the speaker put on an item of clothing.

A common memory trick is:

• надеть что-то
• одеть кого-то

Because Russian often uses a verb like сесть, пойти, лечь, etc. plus an infinitive to show the action someone sat down / went / lay down in order to do.

So:

• села пить чай literally = sat down to drink tea

The infinitive пить expresses the action that follows the sitting down.

This construction is very natural in Russian and often sounds more idiomatic than trying to translate word-for-word from English.

Both are possible, but they mean slightly different things.

• села пить чай = sat down to drink tea
  • emphasizes physically sitting down and then drinking tea
• стала пить чай = started drinking tea
  • emphasizes the beginning of the drinking action

In your sentence, the speaker is describing a natural home routine with physical actions in sequence, so села пить чай fits very well.

It is in the accusative case, but for many masculine inanimate singular nouns, the accusative looks the same as the nominative.

So:

• nominative: чай
• accusative: чай

That is why after пить you get:

• пить чай = to drink tea

So the case does change grammatically, but the form happens to stay the same.

Russian often lists completed actions the same way English does:

• item 1, item 2, and item 3

So here:

• сняла куртку, надела тёплую кофту и села пить чай

This is a normal way to show a sequence of actions performed by the same subject. Russian does not need to repeat я before each verb.

Сразу means right away / immediately.

Here it shows that as soon as she got home, she took off her jacket without delay:

• Дома я сразу сняла куртку... = At home, I immediately took off my jacket...

Its position is natural, but Russian word order is flexible. Moving сразу can slightly change emphasis, for example:

• Дома я сразу сняла куртку = neutral, natural
• Дома я сняла куртку сразу = stronger emphasis on immediately

In your sentence, the placement sounds smooth and standard.