הקורס הזה יקר מדי, ואני לא רוצה לשלם עליו עכשיו.

In Hebrew, this/that usually comes after the noun, not before it.

• הקורס הזה = this course
• literally: the-course this

Also, the noun usually takes ה־ when followed by הזה / הזאת / האלה:

• הספר הזה = this book
• הילדה הזאת = this girl
• הקורס הזה = this course

So the pattern is:

ה + noun + זה/זאת/אלה

In Hebrew, the verb to be is usually not expressed in the present tense.

So:

• הקורס הזה יקר = This course is expensive
• literally: this course expensive

This is completely normal Hebrew.
If you wanted was or will be, then Hebrew would use a form of להיות:

• הקורס היה יקר = the course was expensive
• הקורס יהיה יקר = the course will be expensive

But in the present tense, you normally leave is/am/are out.

מדי means too in the sense of excessively.

So:

• יקר מדי = too expensive
• literally: expensive too-much

In Hebrew, מדי usually comes after the adjective:

• קשה מדי = too difficult
• מהיר מדי = too fast
• יקר מדי = too expensive

That is different from English, where too comes before the adjective.

Yes, it could be just אני לא רוצה, but ו־ means and, so ואני means and I.

In this sentence:

• הקורס הזה יקר מדי, ואני לא רוצה...
• This course is too expensive, and I don’t want...

Hebrew often uses ו־ very naturally to connect clauses.
You could also say the sentence without אני in some contexts, but keeping ואני makes the subject explicit and sounds clear and natural.

Hebrew usually makes negation by putting לא before the verb.

So:

• רוצה = want
• לא רוצה = do not want / don’t want

This is the standard way to negate present and future verbs in Hebrew.

Examples:

• אני רוצה = I want
• אני לא רוצה = I don’t want

Very straightforward: לא + verb.

Yes. In the present tense, Hebrew verbs behave a lot like adjectives/participles and often agree with gender.

For I want:

• male speaker: אני רוצה
• female speaker: אני רוצה

The tricky part is that in normal unvoweled spelling, they look the same.
The difference is in pronunciation:

• masculine: rotze
• feminine: rotza

So the written form stays רוצה, but the spoken form changes.

After רוצה (want), Hebrew normally uses the infinitive of the next verb.

• רוצה לשלם = want to pay
• literally: want to-pay

The ל־ at the start of לשלם is part of the infinitive form.

Other examples:

• אני רוצה לאכול = I want to eat
• אני רוצה ללכת = I want to go
• אני רוצה ללמוד = I want to study

So רוצה + infinitive is a very common pattern.

עליו is made from:

• על = on / about / for
• ־יו = him / it (masculine singular)

Together, עליו means on him, about him, or in this kind of sentence, for it.

Here it refers back to הקורס, which is a masculine noun, so:

• לשלם עליו = to pay for it

This kind of attached pronoun is very common in Hebrew:

• עליו = on him / about him / for it
• עליה = on her / about her / for it
• עליהם = on them / about them

Because Hebrew uses the preposition על with things you pay for.

• לשלם על קורס = to pay for a course
• לשלם עליו = to pay for it

This is important because English learners may expect a direct object, but Hebrew does not usually say לשלם אותו for pay it in this sense.

A useful contrast:

• לשלם על משהו = pay for something
• לשלם למישהו = pay someone

So:

• אני משלם על הקורס = I’m paying for the course
• אני משלם למורה = I’m paying the teacher

Both can be possible in some contexts, but עליו is the more natural choice when referring back to a specific masculine singular noun like הקורס.

• הקורס... לשלם עליו = the course... pay for it

Using the attached pronoun makes the sentence flow more naturally and avoids repeating or pointing again with זה.

So עליו is a very common and elegant way to say for it.

Hebrew word order is fairly flexible, and adverbs like עכשיו (now) often come at the end.

So:

• ואני לא רוצה לשלם עליו עכשיו = and I don’t want to pay for it now

This is very natural Hebrew.

You could move עכשיו for emphasis, for example:

• ועכשיו אני לא רוצה לשלם עליו = and right now I don’t want to pay for it
• אני עכשיו לא רוצה לשלם עליו = I now don’t want to pay for it

But the original version sounds smooth and neutral.

Yes. יקר is an adjective meaning expensive (or dear/precious in other contexts), and it agrees in gender and number with the noun.

Since קורס is masculine singular, the adjective is also masculine singular:

• קורס יקר = an expensive course

Compare:

• מכונית יקרה = an expensive car (feminine singular)
• קורסים יקרים = expensive courses (masculine plural)
• מכוניות יקרות = expensive cars (feminine plural)

So יקר matches הקורס.

A natural pronunciation is roughly:

ha-kurs ha-ze ya-kar mi-dai, ve-a-ni lo ro-tze le-sha-lem a-lav akh-shav

A few helpful notes:

• הזה = ha-ze
• יקר מדי = ya-kar mi-dai
• עליו = a-lav
• עכשיו = usually akh-shav

If the speaker is female, רוצה would be pronounced rotza instead of rotze.

Yes. עכשיו means now, and כרגע means right now / at the moment.

So:

• אני לא רוצה לשלם עליו עכשיו = I don’t want to pay for it now
• אני לא רוצה לשלם עליו כרגע = I don’t want to pay for it right now / at the moment

Both are natural, but עכשיו is simpler and very common in everyday speech.

Yes, very natural. It sounds like normal spoken and written modern Hebrew.

It uses several very common patterns:

• noun + הזה for this + noun
• no present-tense is
• adjective + מדי for too + adjective
• לא for negation
• רוצה + infinitive
• לשלם על... for pay for...

So it is an excellent sentence for learning useful everyday Hebrew structure.