Sexually confident(HELP!!!!)

I need help on how to be more sexually confident. I have a long distance relationship and sometimes I step back from pleasing my boyfriend and myself. I need some advice on how I should initiate it (like what would be some good things to say) and not be so doubtful about myself during that time. I don’t think I’m good at dirty talk and idk how to feel better about doing it. I’m such an awkward human being.