Nie chcę moknąć na przystanku, więc wsiadam do autobusu.

Chcę is the 1st person singular form of chcieć (to want), so it means I want.

• chcę = I want
• chcesz = you want
• chce = he/she/it wants

So in Nie chcę moknąć..., the speaker is saying I don’t want...

Also, Polish often drops the subject pronoun, so ja is not necessary. Chcę already tells you the subject is I.

After verbs like chcieć (to want), Polish normally uses the infinitive of the second verb.

So:

• chcę moknąć = I want to get wet / be getting wet
• literally: I want get wet

Polish does not use a separate word like English to before the infinitive in this structure.

Other examples:

• Chcę iść. = I want to go.
• Muszę pracować. = I have to work.
• Lubię czytać. = I like to read.

Moknąć means to be getting wet, especially from rain or snow. It suggests an ongoing process, not just the final result.

In this sentence, the idea is:

• I don’t want to stand there getting wet at the stop

A learner may compare it with zmoknąć:

• moknąć = to be getting wet, to be out in the rain getting soaked little by little
• zmoknąć = to get soaked / to end up wet

So Nie chcę moknąć feels very natural if the speaker wants to avoid the unpleasant experience of being out in the rain.

In Polish, you normally say na przystanku for at the bus stop / tram stop / stop.

This is just the usual preposition with przystanek in this meaning.

• na przystanku = at the stop
• w przystanku would usually sound wrong if you simply mean waiting at the stop

If you mean being physically inside a shelter, Polish might use a different phrase, for example:

• w wiacie przystankowej = in the bus-stop shelter

So na przystanku is the standard phrase for location at a stop.

Because the preposition na with location takes the locative case.

Base form:

• przystanek = stop

After na for location:

• na przystanku = at the stop

This is a normal case change in Polish. You are not learning a new word, just a different form of the same noun.

Because więc means so, and in Polish it is normally preceded by a comma when it links two clauses.

So:

• Nie chcę moknąć na przystanku, więc wsiadam do autobusu.
• I don’t want to get wet at the stop, so I’m getting on the bus.

This is standard punctuation in Polish.

The verb wsiadać (to get on / board / get into) usually goes with do + genitive when talking about entering a vehicle.

So:

• wsiadać do autobusu = to get on the bus
• wsiadać do samochodu = to get into the car
• wsiadać do pociągu = to get on the train

Here:

• do requires the genitive
• autobus becomes autobusu

So the structure is:

• wsiadam = I’m getting on / I get on
• do autobusu = onto/into the bus

Because with this verb, Polish normally does not use w + accusative.

The standard pattern is:

• wsiadać do
  • genitive

So:

• wsiadam do autobusu = correct
• wsiadam w autobus = not the normal standard construction

There is a useful contrast here:

• wsiadać do autobusu / samochodu / pociągu = board or get into a vehicle
• wsiadać na rower / motocykl / konia = get on a bike / motorcycle / horse

So Polish distinguishes between things you get into and things you get onto.

Because do requires the genitive case.

Dictionary form:

• autobus = bus

After do:

• do autobusu = into/on the bus

This is the genitive singular form.

Other examples:

• do domu = to the house / home
• do sklepu = to the shop
• do pociągu = onto the train

Polish often uses the present tense to describe what someone is doing right now or what they are doing as an immediate response.

So więc wsiadam do autobusu can mean:

• so I’m getting on the bus
• so I get on the bus
• sometimes, depending on context, almost so I’ll get on the bus

The Polish present tense is very natural here because the action is immediate and unfolding.

Because Polish is a pro-drop language: the verb ending usually shows who the subject is.

• wsiadam already means I am getting on / I get on
• you do not need ja

Adding ja is possible, but it gives extra emphasis:

• ...więc ja wsiadam do autobusu. = ...so I get on the bus.

Without emphasis, the version without ja is more natural.

Not completely. Polish word order is more flexible than English, but the original sentence is very natural and neutral.

Standard version:

• Nie chcę moknąć na przystanku, więc wsiadam do autobusu.

You could move things around for emphasis, for example:

• Nie chcę na przystanku moknąć, więc wsiadam do autobusu.
• Więc wsiadam do autobusu, bo nie chcę moknąć na przystanku.

But the original order is the most straightforward and natural for a learner to use.

Wsiadam is the imperfective verb wsiadać.

The aspect pair is:

• wsiadać = imperfective
• wsiąść = perfective

In the present tense:

• wsiadam = I’m getting on / I get on

A perfective future form would be:

• wsiądę = I will get on

In your sentence, wsiadam fits well because it presents the action as something happening now or beginning now as a response to the situation.