How do i give him more confidence?

Me and the guy I’m seeing have only had sex once, we were each other’s firsts. It was pretty good at times but other times he kept going soft. He was worried about finishing too quickly, not doing the right things, making sure i was enjoying myself and got in his head. I appreciate that he was worried about my needs but sex is about both people and i want to make sure he’s comfortable telling me what he wants too. If he’s constantly worried, it’s not good for me either. What are some ways i can give him some more confidence in himself? I’m a fairly open minded person and i want him to feel comfortable expressing what he’s into.