I know all about lacking confidence. I have never attempted to go to school to study creative writing, but I did ponder about it a year or so ago. Where I live, Creative Writing classes isn't common and I looked at a program online via a university in Texas. I decided against it because I had no clue if I was even good enough, I wasn't feeling 100% focused, it was expensive, online schooling is hard and even more so when the school is so far away I can't just drop by one day I got some questions etc. And, I also asked a friend of mine, a published writer, for advice. I explained the situation and I was advised not to. I told her how I had been writing for so many years, how I'd been dying to publish for such a long time, but always chickened out, how I dislike school and I was never fond of it.
Looking back, I kind of regret I didn't do it. I still lack confidence and I think it could've helped me to get over that if I indeed tried to take some classes. Instead I'm trying to finish up my mini colletion of short stories and self publish it. Right now I'm working on a short story with yet another subject I know very little about, but I hope it will turn out as nicely as the others have done (not that I can say they're good, but at least one person like them so far, which is a small beginning at least since no one else have read them so far
).
Sometimes I think it all depends on how much you want something, if you're willing to let go of your fear and how much you're willing to learn. Of course there are many ways to learn something and it can also be individual what works for you and what's not. But at the end of the day it all boils down to the same thing: in order for you to gain, you have got to let youurself let go of your fear.
I try to do that every day.
Good luck!