You can start small. When you are both naked and lying in bed, touch different parts of his body and say what you want to do with them. Don’t be afraid to get creative and talk about places your fingers and lips have never been before, and then do it.
They say women love with their ears. But men like nice words just as much! Tell him he has a big penis and you can do literally anything. In ordinary life, few people like comparisons with others, but the words “you are the best” in bed will be stuck in his memory for a long time.