I know exactly how you feel. I just made my Github this semester, I am not a great coder and most of my code isn't that great. But I am so happy I put it up, it pushes me to improve both my code and my programming skills. Mostly because i know people will see it, but I do not care about that anymore. I just enjoy doing it.

Don't be afraid, everyone starts somewhere. Today you might not be the best, or tomorrow, but you will improve.