I'm Trying out for 7th Grade Cheer as a flyer?

I can easily go up in a tee and do an arabesque, bended leg scale, almost scorp (haha), and ofcourse a lib. Everyone tells me extensions are seldom done at our school, but I'm going to do it anyway just to impress. Tryouts are in late sept, and right now it's may of 6th grade. What are some ways to distract myself from being scared and losing balance. ALSO: back handsprings are not nesscasary, but do you think I could get mine by then? Thanks for reading. Another question...are cheer bows for tryouts traditionally snow white?