אני לא מכירה את המקום הזה, ולכן אני לא רוצה ללכת שם לבד בלילה.

Because the speaker is female.

In Modern Hebrew present tense, verbs agree with gender and number.

• מכירה = feminine singular
• מכיר = masculine singular

With רוצה, the usual unpointed spelling is the same for both masculine and feminine singular, but the pronunciation is different:

• male: rotse
• female: rotsa

So a male speaker would say:

אני לא מכיר את המקום הזה, ולכן אני לא רוצה ללכת שם לבד בלילה.

Because להכיר is the natural verb for being familiar with a person or place.

So:

• אני לא מכירה את המקום הזה = I am not familiar with this place
• אני לא מכירה אותו = I do not know him

By contrast, יודעת is usually for knowing facts, having information, or knowing how to do something.

For example:

• אני יודעת את התשובה = I know the answer
• אני יודעת לשחות = I know how to swim

For a place, מכירה is the normal choice.

Here, את is the direct object marker. It does not really translate into English.

It appears before a definite direct object, such as:

• את המקום הזה = this place
• את הספר = the book
• את דנה = Dana

So in this sentence, את is there because המקום הזה is definite: this place.

Important: this את is not the pronoun you feminine singular. Hebrew has two different words spelled את in ordinary writing, and the meaning comes from context.

Because in Hebrew, demonstratives such as הזה, הזאת, and האלה usually come after the noun.

So:

• המקום הזה = this place
• הספר הזה = this book
• הילדה הזאת = this girl

Also, the noun is normally definite too, so you get ה־ on the noun.

Since מקום is masculine singular, the matching demonstrative is הזה.

It is very normal to repeat אני at the start of the second clause.

Hebrew often repeats the subject when starting a new clause, especially in standard speech and writing. That is even more useful in the present tense, because forms like רוצה show gender and number, but not clearly person.

So:

• ולכן אני לא רוצה... = very natural and clear
• ולכן לא רוצה... = possible in casual speech if the subject is obvious, but less standard

Keeping אני makes the sentence sound complete and natural.

ולכן means and therefore, and so, or simply so.

It connects the first idea to the result:

• I am not familiar with this place
• therefore / so I do not want to go there alone at night

You can break it down like this:

• ו־ = and
• לכן = therefore

So ולכן is a very common connector for cause and result.

This is a very common Hebrew pattern:

• רוצה = want
• ללכת = to go / to walk

So רוצה ללכת means want to go or want to walk.

Hebrew often expresses want to do something with:

רוצה / רוצה + infinitive

Examples:

• אני רוצה לאכול = I want to eat
• היא רוצה לישון = she wants to sleep
• אנחנו רוצים לצאת = we want to go out

The ל־ at the beginning of ללכת is the normal infinitive marker, similar to English to.

It can mean both, depending on context.

Its basic meaning is movement on foot, but in many everyday sentences it also works like English go.

So in this sentence, ללכת שם לבד בלילה could be understood as:

• go there alone at night
• walk there alone at night

The context decides which feels more natural.

If you specifically mean travel by car/bus/train, Hebrew often uses לנסוע instead.

Yes, ללכת לשם would also be possible, and many learners notice this.

The difference is roughly:

• שם = there
• לשם = to there / to that place

After a motion verb like ללכת, לשם can sound more directly like go there.

But שם can also work, especially if the idea is more like:

• be walking there
• walk around there
• be in that area

So ללכת שם לבד בלילה is understandable and natural in context. If you want to emphasize movement to that place, ללכת לשם is also a very good option.

לבד means alone or by oneself.

In everyday Modern Hebrew, לבד is commonly used for anyone, regardless of gender.

There are also more specifically inflected forms, such as:

• לבדי = by myself
• לבדו = by himself
• לבדה = by herself

But in normal everyday speech, לבד is the most common and natural choice here.

Because Hebrew usually uses the preposition ב־ for times and time periods.

So:

• בלילה = at night
• בבוקר = in the morning
• בערב = in the evening

That is why בלילה is the natural form here.

Yes. The forms מכירה and רוצה are present-tense forms in Modern Hebrew.

Hebrew present tense is built from forms that also behave a bit like adjectives, which is why they show gender and number.

So in this sentence:

• אני לא מכירה = I do not know / I am not familiar with
• אני לא רוצה = I do not want

Then ללכת stays in the infinitive after רוצה.