How do i know what to do..............?

So this guy i like asked me out on a date and part of me wants to go because i really like him but the other part of me doesn't because i'm too scared. I'm very inexperienced, i've only ever kissed one guy and that's pretty much all i've done with a guy. I'm too awkward and frigid when it comes to having a boyfriend. Everyone says kissing and all the other stuff comes naturally but really, how do i know what to do? how does anybody know what to do? i don't understand it. How do i overcome this fear??