So how do you blowjob?

I been daiting for 6 months. In a long distance relationship. I think the reason why my bf doesn't want to have sex is because we are both too broke to risk any pregnancy. We are both in college by the way. Hes experience but I'm not. I'll be seeing him in two weeks. We both want to be more intimate but not risking a pregnancy. He has fingered me and gone down on me but I haven't done anything for him. I don't know if I like giving blowjobs but I would like to atleast try and be able to please him.

What are your Tips? Any advice is greatly appreciated:)