Hey! I am myself in the same boat.. so you have company :) I have struggled with confidence with quite some time and I think the only way to increase confidence is to increase competence. Do whatever you like, with sincerity, and believe in yourself. You may fail to achieve what you desire. But don't give up. Be honest with yourself and be patient. Confidence will increase gradually. Also, don't forget to congratulate yourself, when you make even little progress. All the best