Instructing him

So I'm not very experienced and I don't masterbate, so I've never orgasmed. Whenever I'm with a guy and he's fingering me, he usually doesn't get it right, as in I rarely feel anything good. My friend said to instruct him and tell him what to do. But I'm so awkward and inexperienced I don't know what to say. What do you say to help him that doesn't sound weird? I know if I masterbated I would know what I like more but I just don't like to do it and even then I still wouldn't know how to phrase things less awkward. So what do I say? Because I'm getting tired of this never orgasming thing