من امروز تلویزیون تماشا نکردم، چون خسته بودم.

Yes. Persian often drops subject pronouns because the verb ending already shows the person.

So نکردم already means I did not do, and بودم already means I was.
That means this sentence could also be:

امروز تلویزیون تماشا نکردم، چون خسته بودم.

Adding من is still correct. It can make the subject a little clearer or slightly more emphatic.

Persian usually follows Subject – Object – Verb order, not Subject – Verb – Object like English.

So instead of:

I did not watch television

Persian says more literally:

I today television watch did-not

That is why نکردم comes at the end of the first clause, and بودم comes at the end of the second clause.

تماشا کردن is a compound verb, very common in Persian.

• تماشا = watching, viewing, spectacle
• کردن = to do

Together, تماشا کردن means to watch.
In the past tense, کردم means I did, so:

• تماشا کردم = I watched
• تماشا نکردم = I did not watch

In compound verbs, the meaning comes from the whole unit, not just from translating each part separately.

In Persian compound verbs, negation usually goes on the light verb part, not on the noun or nonverbal element.

So:

• تماشا کردم = I watched
• تماشا نکردم = I did not watch

You do not say ن تماشا کردم.
The negative prefix نـ attaches to the conjugated verb: کردم → نکردم.

That is a very common learner question. In this sentence, تلویزیون is being used in a general sense, like watch TV as an activity, so را is often omitted.

So:

تلویزیون تماشا کردم = I watched TV

If the object were more specific or clearly definite, را would be more likely. For example, if you were talking about a specific thing you watched, Persian often uses را.

With تلویزیون meaning TV in a general activity sense, leaving out را sounds natural.

It can mean either, depending on context.

In this sentence, with تماشا کردن, it means TV / television programs, not just the physical device.
So the sense is watch TV, not look at the television set.

Persian often uses تلویزیون this way, just like English uses TV.

Yes, امروز can move around somewhat, because Persian word order is flexible as long as the verb stays in a natural final position.

Your sentence:

من امروز تلویزیون تماشا نکردم، چون خسته بودم.

is very natural. But you could also say:

امروز من تلویزیون تماشا نکردم، چون خسته بودم.

Both are grammatical. The difference is mostly about emphasis and style, not basic meaning.

In Persian, many states are expressed with an adjective plus a form of بودن (to be).

So:

• خسته = tired
• بودم = I was

Together:

خسته بودم = I was tired

This is very normal Persian structure. It works like:

• خوشحال بودم = I was happy
• آماده بودم = I was ready

This is an important difference:

• خسته بودم = I was tired
• خسته شدم = I became tired / I got tired

In your sentence, the idea is that tiredness was the reason for not watching TV, so خسته بودم is the right choice.

If you said چون خسته شدم, it would mean because I got tired, which focuses more on becoming tired rather than simply being in that state.

چون means because.

It introduces the reason:

• چون خسته بودم = because I was tired

It works very straightforwardly. Persian does not need any special verb change after چون here.

You can put the because clause after the main clause, as in your sentence, or before it:

چون خسته بودم، امروز تلویزیون تماشا نکردم.

Both are natural.

Both are in the simple past.

• نکردم = I did not do / I did not watch
• بودم = I was

So the whole sentence describes a completed situation in the past: today, I did not watch TV, because I was tired.

In everyday Persian, this simple past is used very often, including in cases where English might also use other past forms depending on context.

A simple pronunciation guide would be:

man emruz televizion tamasha nakardam, chun khaste budam

A few notes:

• خ in خسته is like the ch in Scottish loch or German Bach
• ق / غ are not in this sentence
• و in بودم sounds like u in rule
• چون is usually pronounced chun

This is only an approximation, but it is a good starting point.

It is neutral and standard, and it sounds completely natural.

تلویزیون تماشا کردن is a standard way to say to watch TV. In casual speech, some speakers may use other expressions too, but this sentence is perfectly good Persian and suitable for learners.

So if you use this sentence, it will sound correct and natural in normal conversation.

Yes. In Persian writing, punctuation is used, but it is often less rigid than in English.

So both of these are acceptable:

من امروز تلویزیون تماشا نکردم، چون خسته بودم.
من امروز تلویزیون تماشا نکردم چون خسته بودم.

The comma helps readability by separating the main clause from the reason clause, so many writers would keep it.

Absolutely.

امروز تلویزیون تماشا نکردم، چون خسته بودم.

This is probably what you would hear very often in real Persian. Since نکردم and بودم already show I, the subject is clear without من.

Using من is not wrong at all; it just makes the subject more explicit.