What's the difference between "Learn" and "Learn about"?

These are correct without doubt.

I am learning a new thing.

I am learning English.

I am learning a new language.

How about "learn about"?

I think there are cases where learn about is used, but what's the difference?


I am learning English. eg English grammar, eg English vocabulary

I am learning about English. eg the history of English, eg the countries where English is spoken .


learning skill and learning about information?