Most Helpful Guy
He obviously likes you, and you like him. If you are inexperienced the key with guys is affection and enthusiasm. It should be an expression and enjoyment of love, not anxiety. Plently of kissing him all over, and eagerness to learnn and try new things, and you two will be fine.
Most Helpful Girl
He's going to know and understand that you have less experience. Just be open to new experiences and trying new things and you'll be fine :)