من امروز نمیخواهم به آن رستوران بروم.

Yes. In Persian, the verb ending in نمی‌خواهم already tells you the subject is I because -م means I.

So this sentence could also be:

امروز نمی‌خواهم به آن رستوران بروم.

That is still perfectly clear.

Learners often see subject pronouns used anyway because they can add:

• emphasis
• contrast
• clarity

For example, من might be used if you want to stress I don’t want to go.

امروز means today.

In this sentence:

من امروز نمی‌خواهم به آن رستوران بروم.

it comes after من, but Persian word order is somewhat flexible. You can often move time words around without changing the basic meaning.

Possible variants:

• من امروز نمی‌خواهم به آن رستوران بروم.
• امروز من نمی‌خواهم به آن رستوران بروم.
• نمی‌خواهم امروز به آن رستوران بروم.

These all mean roughly the same thing, though the emphasis may shift slightly.

نمی‌خواهم can be broken down like this:

• نـ = negation, not
• می = imperfective/present marker
• خواه = verb stem from خواستن (to want)
• ـم = I

So نمی‌خواهم means I do not want or I don’t want.

A very literal breakdown would be something like:

not + present/imperfective + want + I

But in natural English, just think of it as I don’t want.

In standard Persian spelling, it is usually written:

نمی‌خواهم

with a half-space (also called a zero-width non-joiner) between می and the rest of the verb.

So the most standard written form is:

من امروز نمی‌خواهم به آن رستوران بروم.

You may also see نمیخواهم written without the half-space in informal typing, but نمی‌خواهم is the better standard form.

به here means to.

The verb رفتن means to go, and when you say where someone goes, Persian commonly uses به before the destination:

• به مدرسه = to school
• به خانه = home / to the house
• به آن رستوران = to that restaurant

So:

به آن رستوران بروم = go to that restaurant

Yes. آن means that.

So:

• این = this
• آن = that

In speech, many speakers often use:

• این / اینجا
• اون instead of آن

So in everyday spoken Persian, you may hear:

من امروز نمی‌خوام برم اون رستوران.

That is a more conversational version of the same idea.

This is one of the most important grammar points in the sentence.

After خواستن (to want), Persian normally uses the subjunctive form of the next verb.

So:

• می‌روم = I go / I am going
• بروم = that I go / to go after verbs like to want

That is why Persian says:

می‌خواهم بروم = I want to go

and not normally می‌خواهم می‌روم.

In your sentence:

نمی‌خواهم به آن رستوران بروم.
= I don’t want to go to that restaurant.

بروم is the 1st person singular subjunctive form of رفتن (to go).

A simple way to think of it is:

• verb: رفتن = to go
• present/subjunctive stem: رو
• subjunctive prefix: بـ
• ending for I: ـم

So the result is:

ب + رو + م = بروم

This means that I go or, after want, simply go in English translation.

Persian writing usually does not show short vowels, so learners often wonder how to read forms like this.

بروم is commonly pronounced something like:

• beravam in careful/formal pronunciation
• often closer to beram in everyday speech

This is normal in Persian: the written form does not always show all the short vowels you hear.

Similarly:

• می‌خواهم is carefully mikhāham
• in speech it often becomes mikhām

So a natural spoken version of the full sentence may sound like:

man emruz nemikhām be un resturān beram

Because Persian does not use the same structure as English here.

In English, you say:

• I want to go

In Persian, the idea is more like:

• I want [that] I go

That is why Persian uses می‌خواهم / نمی‌خواهم + subjunctive verb:

• می‌خواهم بخورم = I want to eat
• می‌خواهم ببینم = I want to see
• نمی‌خواهم بروم = I don’t want to go

So there is no separate word exactly matching English to in want to go.

را marks a specific direct object.

But in this sentence, آن رستوران is not the direct object. It is the destination of the motion verb رفتن.

So:

• آن رستوران را می‌بینم = I see that restaurant
  Here, آن رستوران is a direct object, so را can appear.
• به آن رستوران می‌روم = I go to that restaurant
  Here, it is a destination, so you use به, not را.

It is basically standard written/neutral Persian.

A more standard written version would be:

من امروز نمی‌خواهم به آن رستوران بروم.

A more conversational spoken version would often be:

من امروز نمی‌خوام برم اون رستوران.

Differences:

• نمی‌خواهم → نمی‌خوام
• بروم → برم
• آن → اون

All of these are very common in everyday speech.

Yes, very natural.

Because Persian verbs show the subject, you can say:

امروز نمی‌خواهم به آن رستوران بروم.

This is probably what you would hear often in normal conversation unless the speaker wants emphasis on I.

A useful breakdown is:

من | امروز | نمی‌خواهم | به آن رستوران | بروم

which corresponds roughly to:

I | today | do not want | to that restaurant | go

Persian often puts the main verb at the end, and in sentences with خواستن, the second verb usually comes last.

So the overall pattern here is:

subject + time + want/not want + destination + subjunctive verb

That makes the sentence feel very Persian in structure, even though the English translation may look different.

In this sentence, the natural meaning is simply I don’t want.

Although می is often associated with present/imperfective meaning, you usually should not translate نمی‌خواهم word-for-word as I am not wanting. In normal English, that sounds unnatural.

So:

• نمی‌خواهم = I don’t want
• می‌خواهم = I want

That is the best way to understand it in everyday use.