Sex position

My SO has a hard time getting off if he is not on top. We can do any position but nothing happens until we are missionary and he's on top. There was a couple times when he said he was close with me being on top but due to my injured hip I can't be up there as long as we both would like. When he masturbates he don't like me looking until he's getting ready to be done then he likes to let me watch and participate for the grand finally. I don't think he gets much pleasure out of oral.. Im pretty sure I do it right, I've googled it and watched porn lol. And nothing happens when I give him a hand. We are very very comfortable around each other in any other aspect. Is there a way I can help him get more comfortable or experimental about this?