How to prepare for ur first sex ?

hi frnds iam 21 years of age,today i got a chance to do sex with a gorgeous gal,iam on the way to meet her,iam bit confused with a lot of thoughts wandering in my mind what to do there,my frnd told me that i should do a hand work before starting that,is it correct,plz give ur valuable suggestions to me,love to read ur feed back....