मैं जल्दी उठती हूँ।

Because the sentence is being spoken by a female speaker.

In the habitual present, Hindi verbs often show gender and number:

• उठता = masculine singular
• उठती = feminine singular
• उठते = plural / sometimes masculine plural

So:

• मैं जल्दी उठती हूँ। = said by a woman/girl
• मैं जल्दी उठता हूँ। = said by a man/boy

English does not do this, so this is something learners often have to get used to.

Here, जल्दी means early.

So मैं जल्दी उठती हूँ। means I wake up early or I get up early.

A useful thing to know is that जल्दी can also mean quickly or soon, depending on context. For example:

• जल्दी आओ। = Come quickly. / Come soon.
• मैं जल्दी उठती हूँ। = I get up early.

So the exact meaning depends on the sentence.

It comes from the verb उठना, which means to get up, to rise, and in many everyday contexts also to wake up.

In this sentence:

• उठती = habitual form, feminine singular
• हूँ = am / first-person singular auxiliary

So literally, it is something like:

• I am one-who-gets-up early

But in natural English, this is simply:

• I wake up early
• I get up early

हूँ is the first-person singular form of होना (to be), and it is used as an auxiliary in this tense pattern.

The structure here is:

• मैं = I
• जल्दी = early
• उठती = get up / wake up (habitual feminine form)
• हूँ = am

In standard Hindi, the habitual present usually uses this auxiliary:

• मैं उठती हूँ = I get up / I wake up
• तुम उठते हो = you get up
• वह उठता है = he gets up

In casual speech, people sometimes drop the auxiliary, but in standard learning material it is normally included.

Normally, it means I wake up early or I get up early.

This is the habitual present, which is used for:

• habits
• routines
• general truths
• repeated actions

So it suggests something a person does regularly.

If you want to say I am waking up early right now / these days, Hindi would more naturally use a progressive form, such as:

• मैं जल्दी उठ रही हूँ। = I am getting up early. (female speaker)

So:

• मैं जल्दी उठती हूँ। = habitual, regular action
• मैं जल्दी उठ रही हूँ। = ongoing/current action

The word order is:

• मैं = subject
• जल्दी = adverb
• उठती = main verb
• हूँ = auxiliary

So the pattern is roughly:

Subject + adverb + verb + auxiliary

Hindi often prefers the main verb toward the end of the sentence, unlike English.

Compare:

• English: I wake up early
• Hindi: मैं जल्दी उठती हूँ

Notice that early comes before the verb in Hindi.

Yes, very often.

Hindi frequently drops subject pronouns when they are already clear from context. So a speaker could simply say:

• जल्दी उठती हूँ।

This still means I wake up early, and the हूँ already helps show that the subject is I.

However, learners are often taught to include मैं at first, because it makes the sentence structure clearer.

It can mean either, depending on context.

• उठना often means to get up
• In everyday speech, it can also be used where English says wake up

So मैं जल्दी उठती हूँ can be understood as:

• I wake up early
• I get up early

If you want to focus specifically on the idea of becoming awake, Hindi also has:

• जागना = to wake up / stay awake

A rough contrast is:

• जागना = wake up, become awake
• उठना = get up, rise from bed

But in normal conversation, उठना is very commonly used in the sense of waking/getting up in the morning.

Hindi works differently from English.

In this kind of sentence, the main verb form often agrees with the speaker’s gender and number, not just the subject person in the way English does.

So with मैं:

• a male speaker says मैं उठता हूँ
• a female speaker says मैं उठती हूँ

The auxiliary then shows person/number:

• हूँ = I am
• हो = you are
• है = he/she/it is
• हैं = plural/formal are

This combination of gender marking on the main verb plus person/number on the auxiliary is very common in Hindi.

Yes, very natural.

मैं जल्दी उठती हूँ। is a normal way to talk about a routine or habit. For example, someone might say:

• मैं जल्दी उठती हूँ और टहलने जाती हूँ।
  I wake up early and go for a walk.

So this sentence is exactly the kind of thing Hindi speakers would say when talking about everyday life.