sex tips

So I've been with my boyfriend for almost two years, April will be 2 years. And we stared having sex after we were together for 5 months. It's great sex every time but I wanna try new things but I don't know what to try or anything.  I give him head and I barley get any head back which I hate but i don't know what to say to get him to do it. Anyone have any sex/ oral tips?