Today is wWednesday.

Remember to use a capital letter for days of the week.

I woke up at 7:30am.

I would use "am" and "pm" for markers of time to differentiate if this was morning or evening.

I willanted to wake up at 6 o'clock.:00am

Hmm, this is a bit confusing because you just said in the previous sentence that you woke up at 7:30am. This sentence implies that you will wake up an hour and a half earlier. Since that doesn't work, I guessed that you might have meant that you wanted to wake up at 6:00am?

Bbecause iI willanted to take a walk.

You should combine this as one sentence: "I wanted to wake up at 6:00am because I wanted to take a walk." The way you had it was not technically a full sentence.

Haha.

We wouldn't really have "haha" in formal writing. More appropriate for texts or messages being sent back and forth.

I will cook Indonesian foods with people from BIPAmy class.

What is BIPA? If you want to reference that, you can give more detail. I changed it to "my class" to account for any confusion.

I do not like it a bitcooking at all.

You say you don't like "it" one bit...what is "it" here? I switched it to "cooking" for clarity.

However i, I like nasi goreng.

Remember to capitalize "I" and any other proper noun.

It's my favorite Insdonesian food.

Today is wWednesday.

Days of the week are capitalized.

I will wake up at 6 o'clock.

In the previous sentence, you wrote "I woke up at 7:30." So are you referring to waking up at 6 tomorrow? If so, "I will wake up at 6 o'clock tomorrow" might be better.

Also, if you want to be consistent with your formatting, changing 6 o'clock to 6:00 might be better. Unless 6 o'clock is a stylistic choice.

Because iI will take a walk.

I is always capitalized (unless it is in lowercase for stylistic reasons in text messages or the like).
If it is a desire, replacing "will" with "want to" might make it more clear. "Because I want to take a walk."

Actually, iI don't really know.

Capital I.

I will cook Indonesian foods with people from my BIPA class.

Would also be better if you specify when.
For example, "This afternoon I will cook..." "Tomorrow I will cook..."

I do not like it a bit.

"I don't really like it" sounds more natural.

However i, I like nasi goreng.

It is delicious.

You could also combine this with the previous sentence: "However, I like nasi goreng because it is delicious."

It's my favorite Insdonesian food.