Your issue is not a punting issue. The desensitising effects of porn are well-documented.
19 is too young to pick up a punting habit. You wanted to lose your virginity. Well, mission accomplished. You can stop now.
Google PUA, and good luck.
Edit: regarding desensitisation, it ain't all bad news. So what if you didn't ejaculate? You're not trying to get anyone pregnant. If you can go for ages without cumming, girls will love it. Sexual inexperience, at your age, won't be a turn-off for normal girls of your peer group. You have plenty of time to learn things the normal way.