I'm not gonna give u general advice (be urself, sense of humour) cuz those are all givens.
1) Start working on making youself a better person - a person that u wanna be. Go to the gym, take cooking classes, do whatever u wanted to do to make urself proud of yourself. Don't think about getting the girl - learn to be independent. You have to learn how to have fun and enjoy life without the praise, attention and affirmation from women.learn to dress well, etc
2) When ur ready, u gotta learn to develop a thick skin for rejection. That means approaching women and just talkin to them like a friend. Some will right away reject you, others will joke with you. Keep things light and funny and do it enough times where rejection just bounces off you. Eventually, with enough practice, talkin to women comes off naturally and smoothly where askin them for their number is just the next logical step rather a major goal.
3) When u get this far, let me know and we can work on dating.