what do I do?

So I recently started having sex, and I’m new to all of this. So me and my bf had sex for the first time and he lasted for about 50mins. We both took each other’s virginity, and I’m just wondering why it took him so long to cum. We had sex the second time and we did it in the car and it was going on for 40mins and he didn’t came at all. Am I doing something wrong? Is there a way to make him cum? It makes me feel insecure that I can’t make him feel good, he doesn’t seem to mind at all but for me I want him to feel good.