I Wanna Be A Cheerleader!!

Hi. Im 14 years old. I wanna be a cheerleader really bad, but I have back and muscle problems, and Im not the cool, pretty,preppy, popular type. If I could become more flexible-which I could- I would try out but thats if I were given a chance. If any1 has any ideas on how I could become a cheerleader plz let me know on here or on my e-mail: angel_baby8903@yahoo.com Thank you 4 ur help!