HOW MUCH MONEY DO BOOK EDITORS MAKE ON AVERAGE?

I would similar to to be a book editor when I connoisseur from college, but I was wondering how most income do book editors have on average? I’m asking since I wish to be means to live flattering absolutely (a good house/appartment, food, heating, pets, etc) on my own, and I wish to know if I would have sufficient income to do that. Also, should I vital in English? I know which sounds similar to a foolish question, but is it customarily compulsory which the chairman wanting to be a book editor majored in English? Thank you!