I'm starting to learn

How is right:
- I'm starting to learn English
- I start studying ..
- I'm start to learning....
?

There are many ways to say this. Your first sentence is correct. Your third sentence ("I am start to learning") is an incorrect version of the first. So,

- I'm starting to learn English.

The second one can be correct depending upon the rest of the sentence. Note that it implies that you have not yet started but will soon.

- I start studying English tomorrow. (Or some other point in the future, e.g. "next month", "during the holiday season", etc.

I'm starting to learn english