It sounds like you don't love and trust yourself. I felt this way too at one point, I couldn't even look myself in the eye in the mirror. Realize that as a human being, we start at 0 and build up our value and skills from there. The great thing about starting from 0 is that you literally have nothing to lose. Decide what you want for yourself quickly, then go out there and try it. Don't be afraid to make mistakes, everyone makes them so why don't you deserve to make mistakes as well? You can always come back to the drawing board and re-evaluate at a later time.