H E L P

Okay .... So I've never masturabted really. And I have never ever had an orgasm. Idk how it feels or what I'm going to do. Or I don't even know when I would be able to ..... I want to do it with my boyfriend because he feels bad that I don't. But I think I would be more comfortable if I did it by myself first ... So how do I masturabte or get myself to cum??