Need a little help

My Boyfriend and I Are a Very Kinky Couple. both Switches too. recently He admitted he’s into The fact that I’m somewhat chubbier and he really likes Girls with more weight on. (I’m into it too haha) He admitted he’d love for me to ride his face and squeeze him/Choke him with my thighs, But I’m worried I’m going to hurt him. i never really Attempted to ride his face due to my weight (Though its a big fantasy of mine) Any tips on how to do it?