לפני חודש לא עשיתי ספורט בכלל, אבל עכשיו אני יוצאת כמעט כל יום.

In this sentence, לפני חודש means a month ago.

Literally, לפני means before, so word-for-word it looks like before a month, but in natural Hebrew this is a standard way to talk about time:

• לפני שעה = an hour ago
• לפני יומיים = two days ago
• לפני שנה = a year ago

So here, לפני חודש is best understood as a month ago.

Because חודש means one month, while חודשיים means two months.

Hebrew has a special dual form for some time words:

• יומיים = two days
• שבועיים = two weeks
• חודשיים = two months
• שנתיים = two years

So לפני חודש = a month ago, but לפני חודשיים = two months ago.

Yes, it is very natural.

Hebrew often uses לעשות ספורט literally to do sport to mean to exercise / work out / do physical activity.

So:

• עשיתי ספורט = I exercised / I did sports
• לא עשיתי ספורט = I didn’t exercise

Another possible Hebrew verb is להתאמן = to train / work out, but לעשות ספורט is very common and everyday.

עשיתי is the first person singular past form of לעשות = to do / to make.

That form is used for I did whether the speaker is male or female. In the past tense, I forms do not change for gender.

Examples:

• עשיתי = I did
• אכלתי = I ate
• הלכתי = I went

So both a man and a woman would say עשיתי ספורט.

בכלל here means at all and strengthens the negative.

So:

• לא עשיתי ספורט = I didn’t exercise
• לא עשיתי ספורט בכלל = I didn’t exercise at all

This is a very common use of בכלל after a negative.

It can also mean generally in other contexts, but in this sentence it clearly means at all.

That is the normal and natural place for it here.

In negative sentences, בכלל often comes after the thing being negated:

• אני לא מבינה בכלל = I don’t understand at all
• הוא לא אוכל בשר בכלל = He doesn’t eat meat at all
• לא עשיתי ספורט בכלל = I didn’t exercise at all

Putting it at the end gives the sentence a natural emphasis.

Because יוצאת is the feminine singular form, so the speaker is female.

In the present tense, Hebrew verbs usually agree with gender and number:

• אני יוצא = I go out / I am going out (male speaker)
• אני יוצאת = I go out / I am going out (female speaker)

So this sentence is being said by a woman or girl.

Because Hebrew handles gender differently in different tenses.

• In the past tense, first person singular usually does not show gender:
  • עשיתי = I did
• In the present tense, the form usually does show gender:
  • יוצא = going out / goes out (masculine)
  • יוצאת = going out / goes out (feminine)

So the difference comes from the grammar of the tense, not from a change in speaker.

Yes, literally יוצאת means goes out / is going out.

The verb is לצאת = to go out / leave.

In this sentence, because the first half talks about exercise, עכשיו אני יוצאת כמעט כל יום probably means something like:

• now I go out almost every day
• or, in context, now I go out to exercise almost every day

Hebrew often leaves some context unstated when it is already understood from the previous clause.

It could have, but the speaker chose a slightly different wording.

If the speaker said:

• אבל עכשיו אני עושה ספורט כמעט כל יום

that would mean very directly:

• but now I exercise almost every day

Instead, the sentence says:

• אבל עכשיו אני יוצאת כמעט כל יום

which literally means:

• but now I go out almost every day

Because the topic is already exercise, the idea is probably that she now goes out regularly, presumably for sports or exercise. Hebrew often avoids repeating the exact same phrase if the meaning is clear from context.

כמעט כל יום means almost every day.

Breakdown:

• כמעט = almost
• כל = every / all
• יום = day

So literally it is almost every day.

There is no the because English and Hebrew structure this expression differently. Hebrew says:

• כל יום = every day

not every the day.

This is completely normal.

It can mean either, depending on context.

Here, עכשיו most naturally means now in the broader sense of nowadays / at this point, not necessarily this exact second.

So the contrast is:

• לפני חודש = a month ago
• עכשיו = now / these days / at present

That kind of contrast is very common in Hebrew.

Because אבל means but, and Hebrew commonly uses a comma before it when joining two clauses.

So the sentence is divided like this:

• לפני חודש לא עשיתי ספורט בכלל,
• אבל עכשיו אני יוצאת כמעט כל יום.

This punctuation is natural and helps show the contrast between past and present.

The sentence follows a very natural Hebrew word order.

First clause:

• לפני חודש = time expression
• לא עשיתי ספורט בכלל = I didn’t exercise at all

Second clause:

• אבל = but
• עכשיו = now
• אני יוצאת כמעט כל יום = I go out almost every day

Hebrew often puts time expressions near the beginning of the clause:

• היום אני עובדת = Today I’m working
• מחר אנחנו נוסעים = Tomorrow we’re traveling
• לפני חודש לא עשיתי ספורט בכלל = A month ago I didn’t exercise at all

So the word order here is very normal and idiomatic.