I can understand Susie's reticence. New member, first post, asking for videos, profile not matching what is being said. There are a lot of one off members here who post very specific stuff then disappear. I'm not saying that Black Barbie is one of these, just that Ivan see why there might be question marks.
However, in the spirit of things I can make a few suggestions...
He wants to be your bitch. What about what you want? You've been a sub to a Master before so think about all the things you had done to you that you might want to reciprocate.
Some light, or even heavy bondage is a good place to start. Get him tied down and blindfolded and then you can get up to whatever you like!
Having him pleasure you is a great start. Make him understand it is about your pleasure first and foremost. If he wants a reward he'll have to work for it! 😉
Keeping him plugged would also be a good idea. Maybe tie his ankles to the headboard. This is a seriously exposing situation an he won't be able to stop you putting whatever you want inside him.
Tease and denial is always good for horny guys. Play with his cock and bring him to the edge over and over but don't let him cum. Maybe he has to make you cum five times before he's allowed release himself. When you do let him cum have him shoot directly into his mouth or feed it to him afterwards. That will show you how serious he really is about this.
As ever, play safe. Meet somewhere public and tell someone where you are going. You only met this guy once, and whilst he is probably a decent chap you can't do any harm by being cautious. He will understand, and if he doesn't then get rid of him fast.
Most of all, enjoy yourself!