I have a question

So, my fiancé and I have been having sex since last summer. I had never been with anyone else and he had been with one, but was in his early teens. Our schedules are opposite so having sex isn’t the easiest because one of us is either at work or sleeping. But, he can’t make me cum. Not oral, not fingering (unless I’m rubbing myself), or with his penis. Sex feels good, but it ends in him finishing and me trying to finish by myself or him trying to help. Any tips??