Sex life?

My bf has been with MANY girls in the past. He has done everything you can think of. Threesomes, ran a train, had sex with older women, had sex in public, etc. I, on the other hand have only been with one guy which is him. I just want to know how to please him in bed. We’ve been having sex for over a year now but I just feel like there’s more that I can do. He ends up doing most of the work which makes me feel bad but at the same time he cums every round but I don’t get to orgasm. Also, his penis is huge. That’s the main reason why I don’t do as much as I should because it hurts really bad. His penis stabs at my cervix in most positions and I can’t ignore and shouldn’t ignore the pain. How do I orgasm? How do I pleasure him? How do I get exciting In bed? What can give me more energy? How do I avoid his penis from stabbing at my cervix? Any sex advice would be appreciated.