I want to be a cheerleader?

im going into the 8th grade in september. this means i have one year to practice for northquincy high school cheerleading try outs. ive wanted to be a cheerleader ever since i was little and now im going to live up to it. im determind. i cant do splits:( but i can do a cartwheel, im working on my roundoff. what should i expect at the try outs, will they give me a routine? do i have to make one up? what are there standards? what do i need to know? im loud and full of spirit. and im a quick learner.