How do I do this position?

make sure he is hard and it is standing up. slowly get on top of him and place it in you.while you are on top you can kiss him and suck on his neck and nipples and hug him

Very carefully. Firstly, the best part for you about being on top is that you have control f the situation, and the rhythm. Do what feels good for you, and don't be afraid to moan a bit, most guys like that. You can also pleasure yourself while your up there, or lean in so that your almost laying on top of him and then tell him to do stuff. Lots you can do, use your imagination.

you get on him and you ride him