I couldn’t make him cum..

We were full on in the mood but didn’t have sex as he didn’t have a condom. We did other stuff such as giving him a handjob, but I haven’t given one before so I was nervous af! He wasn’t cumming, he wasn’t talking or anything so I thought I’m doing it wrong or something, 5 mins later still hasn’t came so I stopped cause I’m so damn nervous. I tried again a bit later and same thing happened. He said it felt good but I just couldn’t make him cum 🤔😭 advice?? Maybe I was suppose to do it longer. We are both 18.