He wants to be dominated. I’m frustrated.

I don’t think I’m very good in bed. My focus has always been my partner’s pleasure since I’m so easy to satisfy, but after starting an actual long-term relationship, I’m seriously questioning if I can satisfy him. I ask him what he wants and he says he wants to be dominated, but gently. When I asked for clarification, he says it wouldn’t work if he has to tell me what to do. It seems every time we do it now there’s something I’m doing that he doesn’t actually like and he has to tell me to stop, and when I try to do things he likes I can’t seem to do it right or with the right timing. He says not to worry about it, that it’s biological  and there’s nothing to be done, but still. It’s starting to affect how I enjoy sex as well, cause I’ve always tied my pleasure to my partner’s so if he’s not getting off it makes it all the harder for me. I’m so frustrated. Any ideas for what I should do?