will i be able to play if i have a waiver signed by my parents?
No. Your parents have cannot just leave you at the game and come to get you later. They have to stay there they whole time. They can either play, or stay in the staging area. There is no waiver they can sign so you can show on your own. Alternately, if you know any 21+ players that come to my games you can ask them to sponsor you. But again they have to be at the game you are attending as well.