For me it's difficult to talk to women due to fear of rejection or the feeling that they might make fun of me.

I also have a bit of trouble in social situation, don't have an easy solution if anyone could come up with a real effective way for shy guys to talk to real women he could write a book and become an instant millionaire.

Any groups associated with things you are interested in, that you could join? Don't join to meet women but join to have fun and to meet people who have common interests, and if some of them happen to be women so much the better.