New to... everything

Okay so I’m a virgin and apparently so is this guy that I’m chatting with. We have been friends for a year or so and things have recently gotten a little steamy. Only one instance in person but it wasn’t anything serious. But we’ve started sexting a bit. I tease a lot with pictures and I’m too scared to go full on nude. He says a lot of things and it really turns me on and he asks to know what I’m gonna do to him and I obviously have no idea. Advice/ideas please?