Help me spice things up, and I have a question

I need some tips, I'm looking to try and spice things up between me and my fiancé. I want our foreplay to be fun and interesting. I'm terrible at giving hickeys. And when I try to bite his neck I bite alittle to hard. And sometimes he wants me to be on top and I have tried, I just don't know what to do and it doesn't really feel good to me. Some one please help me asap