Dziś mam mały apetyt, więc jem tylko jogurt i kilka truskawek.

Yes. Polish often uses mieć (to have) in this kind of expression.

• mam apetyt = I have an appetite
• mam mały apetyt = I have a small appetite
• in natural English, this usually becomes I don’t feel very hungry or I have little appetite

So the Polish structure is more literal than the usual English phrasing.

Because apetyt is a masculine noun in Polish, so the adjective must agree with it.

• mały = masculine singular
• mała = feminine singular
• małe = neuter singular

Since apetyt is masculine, the correct form is mały apetyt.

Polish usually leaves out subject pronouns when they are clear from the verb form.

• mam already means I have
• jem already means I eat / I am eating

So ja is unnecessary here. You could say Ja dziś mam mały apetyt..., but that would add emphasis, like As for me, today I have little appetite.

They both mean today.

• dziś is a bit shorter and slightly more compact
• dzisiaj is also very common and completely natural

So you could say:

• Dziś mam mały apetyt
• Dzisiaj mam mały apetyt

Both are correct.

Yes. więc means so, therefore, or thus.

In this sentence:

• Dziś mam mały apetyt, więc jem tylko jogurt i kilka truskawek.
• Today I have little appetite, so I’m eating only yogurt and a few strawberries.

It links the cause and result:

• small appetite → eating only a little

Because in Polish, więc often introduces a new clause, and a comma is normally used before it.

So this punctuation is standard:

• mam mały apetyt, więc jem...

This is similar to English punctuation in a sentence like:

• I’m not very hungry, so I’m only eating yogurt...

Yes. Polish present tense often covers both the English simple present and present continuous, depending on context.

So jem can mean:

• I eat
• I am eating

In this sentence, because of the context (today, so, only yogurt and a few strawberries), it is naturally understood as something like I’m eating.

Because jogurt is a masculine inanimate noun, and in the singular its accusative form is the same as the nominative form.

So:

• nominative: jogurt
• accusative: jogurt

After jem (I eat), you normally use the accusative for a direct object, but here the form does not change.

That is why:

• jem jogurt = correct

Because kilka (a few / several) requires the genitive plural of the noun.

The noun is:

• singular: truskawka = strawberry
• plural nominative: truskawki = strawberries
• genitive plural: truskawek

So:

• kilka truskawek = a few strawberries

This is a very important pattern in Polish:

• kilka jabłek = a few apples
• kilka pomidorów = a few tomatoes
• kilka osób = a few people

Kilka means a few or several.

It usually suggests a small, indefinite number greater than one. In this sentence:

• kilka truskawek = a few strawberries

It is not as exact as a specific number like trzy (three), and it sounds very natural in everyday speech.

Because tylko means only, and here it limits the whole food phrase that follows.

• jem tylko jogurt i kilka truskawek = I’m eating only yogurt and a few strawberries

In other words, those are the only things being eaten.

Polish word order is flexible, but this placement is very natural and clear.

Yes. Both are correct.

• Dziś mam mały apetyt
• Mam dziś mały apetyt

Polish word order is more flexible than English, and moving words often changes emphasis rather than basic meaning.

Very roughly:

• Dziś mam mały apetyt puts today first
• Mam dziś mały apetyt sounds a bit more neutral in flow

Both are perfectly normal.

No special rule here. i is the normal Polish word for and.

So:

• jogurt i kilka truskawek = yogurt and a few strawberries

It simply joins the two food items.

Yes, mały apetyt is natural. You may also hear:

• mam mały apetyt = I have little appetite
• mam niewielki apetyt = I have a small appetite / a modest appetite
• nie mam apetytu = I have no appetite
• mam mało apetytu = literally, I have little appetite

So mały apetyt is absolutely fine and idiomatic. Mało apetytu is also understandable, but mały apetyt is a very common and natural choice.

A rough English approximation is jish, but that is only approximate.

A few points:

• dz here is part of a Polish sound, not two separate letters
• iś gives a soft sh-like ending
• the word is short: Dziś

If you want a very rough guide:

• Dziś ≈ jeesh/sh compressed into one syllable

The real Polish sound is softer than standard English j or sh, so it is best to listen to native audio if possible.

A rough guide is:

• troo-SKA-vek

Stress in Polish usually falls on the second-to-last syllable, so here the stress is on ska:

• tru-SKA-wek

Some sound notes:

• tru like troo
• ska like ska
• wek roughly like vek

Again, this is only an approximation, but it can help you get started.

Because Polish has no articles.

So where English says:

• a yogurt
• the yogurt
• just yogurt

Polish simply uses:

• jogurt

The exact meaning depends on context. In this sentence, jogurt is understood naturally as some yogurt / a yogurt / yogurt, depending on the situation.

Not in the same way. Jem and zjem come from different aspects.

• jem = imperfective, focuses on the action in progress or in general
• zjem = perfective, focuses on completion, more like I will eat up / I will eat

In this sentence, jem is the natural choice because it describes what the speaker is eating now.

If you said zjem tylko jogurt i kilka truskawek, it would sound more like:

• I’ll eat only yogurt and a few strawberries
• or I will have only yogurt and a few strawberries

So jem fits the original meaning best.