Not sure if I'm ready.

Hi my name is Morgan and I’m from Sacramento Ca. Im 22 years old and bisexual, part of my family knows that I find women attractive, but I have never been in a relationship with a woman before.
I have a date on Wednesday night and I’m so nervous, cause it’s the first girl that has ever been attracted to me. We met on a online dating website. So um does anybody have any advice? I don’t think I can sleep tonight lol.