Yes. You definatly should try out. I was a late bloomer myself, and doing things I would normally be not comfortable with, helped me "come out of my shell" its a chance to meet new friends. You only live once, do not be one of those people who ask "what if".
If your shy no. If you want to be a cheerLEADER you have to have the public skills of speaking, shouting, and dancing. It's not as easy as it looks, so I've heard LOL. It would interfere with your studies. You have to go to practice and other performances. I think to be a cheeleader it also requires a specific GPA to get accepted..
Well it depends on whether or not your willing to go in front of people and shout, cheer, and stuff to get in. And if your good about doing homework and studying for tests i think it should be alright but its just my opinion good luck if you do! :)