The worse thing that can happen to a new ref is being put into a varsity game they are not ready for. You will not understand this until you get your first big game....so I feel like it's a waste of time to even speak on the subject.
Every year, in every chapter, new officials want better games....it will never change...
Hang in there...it will come...
This is your first year....middle school games are what you supposed to do. I would however, ask a veteran official whose head isn't swollen to work a few with you. It's the best training method. You have room for error and time to discuss each situation because of the level of the game.
P.S. Don't be surprised if all you get are middle school games next year. Then the next year....Church school JV...ETC.....It's a progression that ALL of us are used to.