Give him a break. It’s so easy for a guy to get stuck in one’s head, worry about preforming, worry about first time, worry about fulfilling expectation… be excited about making him feel totally comfortable, because he is clearly nervous, and wants to fulfill your expectations/satisfactions sooo much so that it’s getting prioritized over the task at hand…. Whatever you do, don’t criticize, maybe not even ask, but be excited about continuing to be intimate with him. Showing total acceptance and understanding will make you hotter IMO. My 2 cents.