Sex with my boyfriend

So I've had sex numerous times, but I've never had to be too active during "the act!" Im now in a newer relationship of 6 months and the sex with him is great! I want to be more active but I feel like a newb! I've attempted riding my guy and failed miserably. Is there a secret way to be better at this? Apparently he enjoys this position a lot and I want to please him. I also need help in the oral department. Please, please, please, pointers and advice!!