So like tips or something 😂

So ive been talking to this guy and hes 17 and im 15 and we have been friends for many years and hes not a virgin but i am. We’ve been talking alot and we both want some things to happen but im scared because ive never done anything sexual but he’s experienced and im scared and dont know what to do. I want to lose my virginity to him but im just scared like am i too fat? Am i gonna sound weird? Am i gonna make ugly faces?