Love and Sex

So I've been dating this guy for about a month now and he is very adventurous with sex. Let's just say I'm on the conservative side, don't feel like I'm very good at it, and don't participate much. He's absolutely amazing and I want to be able to lighten up and give him the fun he likes. Plus I would like to enjoy it more myself. Anyone have advice for how I can branch out and quit being so self conscious to just have fun with it?