من همیشه کنار پنجره مینشینم و درس میخوانم.

In standard Persian spelling, the prefix می‌ is usually attached with a half-space to the verb:

• می‌نشینم
• می‌خوانم

Many people also type them without the half-space:

• مینشینم
• میخوانم

Both are understood, but می‌نشینم and می‌خوانم are the more standard written forms.

می‌ marks the imperfective form, which often corresponds to:

• the simple present: I sit, I read/study
• the habitual present: I usually sit, I study
• sometimes the present progressive depending on context

In this sentence, because of همیشه meaning always, the sense is clearly habitual:

• می‌نشینم = I sit
• می‌خوانم = I read / study

So here it means something like I always sit... and study.

The ending -م shows first person singular, so it means I.

For example:

• می‌نشینم = I sit
• می‌خوانم = I read / study

That is why Persian often does not need the subject pronoun من.

Because Persian often allows the subject pronoun to be optional.

So both of these are possible:

• من همیشه کنار پنجره می‌نشینم و درس می‌خوانم
• همیشه کنار پنجره می‌نشینم و درس می‌خوانم

Including من can add:

• a little clarity
• a little emphasis
• a more explicit I at the start

In English, you must say I, but in Persian you often do not need to.

Grammatically, the می‌ form can cover more than one idea, but in this sentence it is best understood as a habitual present.

The key clue is همیشه meaning always.

So the sentence is not really I am always sitting... in an ongoing sense. It is more like:

• I always sit by the window and study

So for learners, it is useful to think of this as simple/habitual present.

کنار means beside, next to, or by.

So:

• کنار پنجره = by the window / next to the window

A useful thing to know is that Persian often does not write short vowels, so learners may not see the linking sound in writing. In pronunciation, you may hear something like:

• kenâr-e panjare

That little -e sound is very common in Persian connections between words, even when it is not written.

Persian does not use articles the same way English does.

So:

• پنجره can mean window, the window, or a window
• the exact meaning depends on context

If Persian wants to make something explicitly indefinite, it can use یک:

• یک پنجره = a window

But in many normal sentences, no article is needed.

This is a very common Persian expression.

• درس = lesson / study material
• درس خواندن literally = to read lessons

But idiomatically, it means:

• to study

So:

• درس می‌خوانم = I study

This is one of those combinations that should be learned as a set phrase.

Because Persian is usually a verb-final language.

That means objects and other parts often come before the verb.

So:

• درس می‌خوانم literally looks like lesson I-read
• natural English order is I study or I read lessons

This same pattern appears all the time in Persian:

• کتاب می‌خوانم = I read a book / books
• چای می‌خورم = I drink tea

So seeing the object before the verb is completely normal.

Because both verbs have the same subject: I.

Persian does not need to repeat the subject if it stays the same:

• من همیشه کنار پنجره می‌نشینم و درس می‌خوانم

This means:

• I always sit by the window and study

The second verb automatically keeps the same subject unless something changes. This is very natural in Persian, just as in English you would not usually say I always sit by the window and I study unless you wanted extra emphasis.

همیشه usually comes before the main verb phrase, often fairly early in the sentence.

In your sentence:

• من همیشه کنار پنجره می‌نشینم و درس می‌خوانم

That placement is very natural.

Persian adverbs like همیشه are somewhat flexible, but some positions sound more neutral than others. For a learner, this sentence is a good model:

• subject + همیشه + place + verb

So if you copy this pattern, you will usually sound natural.