sexting

So I have oh most to 0 experience with guys I’m in high school oh most 16 and my friends always share there stories and I want to experience stuff too I’ve been sexting this guy that sits by me in class and it’s been going good but he has slightly more experience than me and I really wanna do stuff but don’t feel comfortable with telling him my little experience what do I do? how do I get a guy to wanna do stuff?