Najpierw wpisuję imię, nazwisko i datę.

Wpisuję comes from wpisywać / wpisać, which means to enter, to fill in, or to write into a form/field.

So in a sentence like this, wpisuję is more natural than piszę because the speaker is not just writing in general, but specifically entering information.

• pisać = to write
• wpisywać / wpisać = to enter, write in, fill in

So Najpierw wpisuję... means something like First, I enter/fill in...

Wpisuję is:

• 1st person singular: I
• present tense
• from the imperfective verb wpisywać

So it means I am entering / I enter.

Polish present tense often covers both English I enter and I am entering, depending on context.

In Polish, subject pronouns are often omitted because the verb ending already shows who is doing the action.

Here, wpisuję clearly means I enter, so ja is unnecessary.

• (Ja) wpisuję = I enter

You can add ja for emphasis, but normally you leave it out.

Najpierw means first or first of all.

It often appears near the beginning of the sentence, especially when describing steps in a process:

• Najpierw wpisuję imię... = First I enter the first name...

Its position is fairly flexible, but sentence-initial position is very common and natural.

Because these nouns are the direct objects of wpisuję, so they are in the accusative case.

But different nouns change differently in the accusative:

• imię → imię
• nazwisko → nazwisko
• data → datę

Why?

1. Imię is a neuter noun, and neuter nouns usually have the same form in nominative and accusative.
2. Nazwisko is also neuter, so it also stays the same.
3. Data is a feminine noun ending in -a, and feminine nouns of this type usually change -a to -ę in the accusative.

So:

• nominative: imię, nazwisko, data
• accusative: imię, nazwisko, datę

Yes. Data is a regular feminine noun ending in -a, so its accusative singular is datę.

This is a very common pattern:

• książka → książkę
• kartka → kartkę
• data → datę

So wpisuję datę is exactly what you should expect grammatically.

Polish does not have articles like English a, an, or the.

So:

• imię can mean a first name, the first name, or just first name
• nazwisko can mean a surname, the surname, or just surname

The exact meaning depends on context.

Not exactly. Imię usually means first name / given name, not full name in general.

Useful distinction:

• imię = first name / given name
• nazwisko = surname / last name
• imię i nazwisko = full name

So in this sentence, imię, nazwisko i datę sounds like the kind of information you enter into a form.

I means and.

Polish lists work much like English ones:

• imię, nazwisko i datę = first name, surname, and date

There is normally no extra word needed before each noun.

Yes. Polish word order is more flexible than English, because case endings show grammatical roles.

The given sentence is very natural:

• Najpierw wpisuję imię, nazwisko i datę.

But other orders are possible for emphasis, for example:

• Imię, nazwisko i datę wpisuję najpierw.

That sounds more marked or contrastive. For a neutral step-by-step instruction or description, the original word order is the best choice.

Yes, wpisuję is imperfective.

The verb pair is:

• wpisywać = imperfective
• wpisać = perfective

In the present tense:

• wpisuję = I am entering / I enter
• perfective wpisać does not have a true present meaning; its present-tense forms usually refer to the future, for example wpiszę = I will enter

Why imperfective here?

Because the speaker is describing a current step or habitual procedure:

• Najpierw wpisuję... = First I enter...

That fits the imperfective very well.

Approximate pronunciation:

• wpisuję ≈ fpee-SOO-yeh
• datę ≈ DAH-teh

A few notes:

• w in Polish sounds like English v/f depending on position; here in wpisuję it sounds close to f
• ę is a nasal vowel in theory, but in everyday pronunciation at the end of a word it is often pronounced very close to e or eh
• j in Polish sounds like English y in yes

So a learner-friendly approximation is:

• Najpierw wpisuję imię, nazwisko i datę
• NAI-pyerv fpee-SOO-yeh EE-myeng, naz-VEES-koh ee DAH-teh

Yes, very naturally.

Wpisuję is commonly used when talking about entering information into:

• a paper form
• a website
• an app
• a registration field
• a document

So the sentence sounds natural in practical, everyday contexts such as explaining what you do first when filling something in.