I would love to be a professional editor XD

Eh, it doesn't pay all my bills or anything. It was more a matter of, I got tired of family and friends and classmates, etc, all using me as a free editor, and started charging. It didn't take very long before word got around! It has tapered off a lot since it started (school was more than a decade ago now!) but there's usually still several term papers or dissertations or articles every quarter.
I'm not sure how you would go about becoming a professional editor in that it would be your main career; but I suspect either a business degree with a minor in the languages you want to edit in (or major in the language(s) and minor in business) would be a good start.

Oh gosh, don't do that Alice. Writing is about spirit and passion. The self editing comes later, and that's what friends are for, to check those things for you.

Well... I hear you. But that also comes with the bug. The creativity bug that is. Tis a fickle beast. I have a degree in writing and a screenplay in the works but for the life of me I just can't touch it. So I've been arting instead. I need to practice and just crank out art again so that I can maybe try my hand at making some money at it. I'm unemployed and have been for a while, need to start making my strengths work for me!

Have you tried doing the little flash-fiction writing challenges to get you going?
Or sometimes you can watch a show you've never seen before with the sound turned off, and then try and write out what you think the story was, that sometimes gets my cousin over his writer's block.

Confidence maybe, it's not good for little else. Wish I'd known that back then x.x Fear of failure is a hard thing to overcome without failing. Gotta just try.