Zařízení používám poprvé.

Here, zařízení most naturally means device, piece of equipment, or appliance.

It is a fairly broad Czech word, so the best English translation depends on context. In other situations, zařízení can also mean things like facility or installation.

Grammatically, it is a neuter noun.

Because the form zařízení is used for several cases in the singular.

In this sentence, it is the direct object of používám, so its function is accusative. But with this noun, the accusative singular looks the same as the dictionary form.

So:

• dictionary form: zařízení
• accusative singular: zařízení

That is completely normal for this type of neuter noun.

Používám is the 1st person singular present tense of používat.

It means:

• I use
• I am using

Which English version sounds best depends on context.

The ending -ám tells you the subject is I, so Czech does not need a separate word for I unless you want emphasis.

Because Czech often omits subject pronouns when they are already clear from the verb ending.

So:

• používám already means I use / I am using
• adding já would be optional

You could say Já používám zařízení poprvé, but that would usually sound more emphatic, like I am the one using it for the first time or I, personally, am using it for the first time.

This is about aspect, which is very important in Czech.

• používat = imperfective
• použít = perfective

Here, používám is natural because the speaker is talking about the act of using the device as something happening now.

A perfective present form in Czech usually does not mean a true present ongoing action. It often has a future sense instead. So a form from použít would not work the same way here.

Very roughly:

• Používám zařízení poprvé = I am using the device for the first time
• Použiju zařízení poprvé = I will use the device for the first time

Poprvé means for the first time, and yes, it is normally written as one word.

It is an adverb, so it does not change form.

You can think of it as part of a pattern:

• poprvé = for the first time
• podruhé = for the second time
• potřetí = for the third time

So in this sentence, poprvé tells you how the action is happening: it is the speaker’s first time doing it.

Czech does not have a separate verb form that works exactly like the English am using progressive.

The present tense of an imperfective verb can cover both ideas:

• I use
• I am using

So používám can be translated either way, depending on context. In this sentence, English usually prefers I am using this device for the first time, but Czech simply uses the ordinary present tense.

Yes. Czech word order is quite flexible, and different orders can shift the focus or emphasis.

The original sentence:

• Zařízení používám poprvé.

This can sound like the device is the topic, and the new information is that this is the first time the speaker is using it.

Other possible orders include:

• Používám zařízení poprvé.
• Poprvé používám zařízení.

All of these can be grammatical, but they do not feel exactly the same. Czech word order often reflects what is already known and what is being emphasized.

A rough guide for an English speaker is:

• Zařízení ≈ ZA-rzhee-zeh-nyee
• používám ≈ POH-oo-zhee-vaam
• poprvé ≈ POP-rveh

A few useful notes:

• Czech stress is usually on the first syllable: ZA-řízení, POU-žívám, PO-prvé
• ž sounds like the s in measure
• ř is a special Czech sound; for beginners, an approximation between r and zh is good enough
• á and í are long vowels

You do not need perfect pronunciation immediately; ř is difficult even for many learners at higher levels.

Yes. That is a very natural translation too.

Because zařízení is broad, the best English word depends on what the object actually is:

• device
• equipment
• appliance
• sometimes even system

So if the context is, for example, a machine or technical setup, I’m using the equipment for the first time could be a better translation than device.