Need help to cheer up

My boyfriend and I were going to have sex today but we both didn't know what we were doing. Everything was stumbling and in the end he couldn't enter me. I know how to fix that for next time but it seems he feels a little down about it. I don't know how to cheer him up and show him that it was both of our first times and I don't hold anything against him. 😞 I love him and I really need help cheering him up.