Getting Married Soon

I mostly just want to vent, but if anyone has advice or thoughts that would be great! So I’m getting married in May. I’m 22 and decided I wanted to wait until marriage to have sex. Now that it’s coming up it’s starting to freak me out. I have no idea what I’m doing or what to expect. I will not be his first so I’m also worried about not being as good as he’s experienced in the past or like not meeting expectations. I feel like the many horror stories of first times has increased my worries more than they need to be. But his mom has also mentioned that she thinks we need premarital counseling because she thinks I’m totally uninterested. I’m not, I’m just nervous. I have really bad anxiety, so I can’t help but worry...... I just have no idea. There’s also so many other things going on involving this marriage that sex isn’t really the first thing I think of. I’m moving states, leaving my whole family, and not knowing anyone other than his family there. I don’t really know what I’m doing or really saying at this point. Sorry....