What do I need to do for the Cheerleading try out?

Im going to a pretty big public school next year and I want to try out for jv cheer. My mom doesnt like cheerleading so I have never been in it before. Can I still make the team if I havent been a cheerleader before since its just jv? And what are the tryouts going to be like? I did gymnastics when I was younger but I dont remember much. I could probably do the basics if I practice. I just need to know what I will have to do to expect to make the squad. (I have been practicing my jumps too)