New to Sex and Not Sure What to Do

So I’m brand new to sex, but obviously I like it. I have social anxiety though and only have had it drunk, and I’m still anxious and awkward. Like what do you do during sex? What am I supposed to be doing? Am I not doing something I’m supposed to be? I know it’s supposed to come natural and I do what’s natural but this voice in my head always says something else. Or nags me. Makes me think I’m failing. I’d never do a BJ or ride a guy because I’d have no idea what I’m doing also. I just let them take the lead and follow or do what they say or feels natural. Still voices haunt me. I don’t watch porn and I know it’s not like porn so I won’t. But I don’t know anything. Any advice?