אני רוצה להתקדם בעברית, ולכן אני לומדת בכל יום.

Because of לומדת.

In Hebrew present tense, verbs agree with the speaker’s gender in the singular.

• לומדת = studying / learning for a female speaker
• לומד = studying / learning for a male speaker

So this sentence is being said by a woman or girl.

This is a very common point of confusion.

The word רוצה is written the same for both:

• רוצה = rotze for a male speaker
• רוצה = rotza for a female speaker

So in normal Hebrew spelling, the masculine and feminine forms are often identical in writing, even though they are pronounced differently. In this sentence, you know the speaker is female because לומדת clearly shows it.

This is the standard Hebrew pattern for want to do:

• אני רוצה = I want
• להתקדם = to progress / to improve / to advance

So אני רוצה להתקדם literally means I want to progress.

Hebrew usually uses:

• a form of רוצה
• an infinitive

For example:

• אני רוצה ללמוד = I want to study
• אני רוצה לנסוע = I want to travel

This is very similar to English want to + verb.

להתקדם means to progress, to advance, or to move forward.

In this sentence, it means something like to get better or to make progress in Hebrew.

So להתקדם בעברית is a natural way to say:

• to progress in Hebrew
• to improve my Hebrew

It is a slightly broader idea than just to learn. It suggests ongoing improvement.

Because the prefix ב־ means in.

• עברית = Hebrew
• בעברית = in Hebrew

So:

• להתקדם בעברית = to progress in Hebrew

Hebrew often attaches prepositions directly to the word:

• ב = in
• ל = to
• מ = from
• כ = as / like

That is why ב + עברית becomes בעברית.

ולכן means and therefore, so, or and so.

It is made of:

• ו = and
• לכן = therefore

So the sentence structure is:

• I want to improve in Hebrew
• and therefore / so
• I study every day

In English, therefore sounds a bit formal, and in Hebrew ולכן can also sound a little more formal than everyday אז (so). But it is completely natural here.

Hebrew often repeats the subject for clarity, especially after a connector like ולכן.

So:

• אני רוצה להתקדם בעברית, ולכן אני לומדת בכל יום.

This sounds complete and clear.

If you removed the second אני, the sentence would usually sound less natural or less complete in standard writing:

• ...ולכן לומדת בכל יום

That kind of omission is more likely in very casual speech, but learners should normally keep the second אני.

Because in present-tense Hebrew, there is usually no separate word for am / is / are.

So:

• אני לומדת literally looks like I studying
• but it means I study or I am studying

Hebrew present tense often covers both the simple present and the present continuous, depending on context.

So אני לומדת בכל יום can mean:

• I study every day
• I am studying every day

In this sentence, I study every day is the more natural English meaning.

Yes, you can also say כל יום.

Both are used:

• בכל יום = every day
• כל יום = every day

בכל יום is a little more explicit or slightly more formal/literary in some contexts.
כל יום is very common in everyday speech.

So this sentence could also be:

• אני רוצה להתקדם בעברית, ולכן אני לומדת כל יום.

Both are natural.

יום by itself just means day.
But בכל יום means on every day / every day.

Here is the breakdown:

• כל = every / all
• בכל = in every / on every

So:

• יום = day
• כל יום = every day
• בכל יום = every day

This is an example of how Hebrew often builds meaning by adding small prefixes rather than separate words.

It would be:

אני רוצה להתקדם בעברית, ולכן אני לומד בכל יום.

The only visible change here is:

• לומדת → לומד

Notice that רוצה stays spelled the same, but it would be pronounced differently:

• female: rotza
• male: rotze

So the feminine sentence is:

• אני רוצה להתקדם בעברית, ולכן אני לומדת בכל יום.

And the masculine version is:

• אני רוצה להתקדם בעברית, ולכן אני לומד בכל יום.