The best relationships start with friendship and trust builds from there. You can go out with someone for a long time at any age and still find loads of ways to have fun and feel close without having sex.
It might take you weeks, months or even years before you decide you’re ready to go further. That’s perfectly ok. Take it slowly, think about your feelings and don’t feel pressured by your partner. If they try to make you do something you’re not ready for, they’re just not right for you.