I really want to do competitive cheer?

Alright, so I really want to do competitive cheer, if my parents let me. But I'm not flexible, my jumps are okay but not the greatest how can I improve on flexibility&jumps? Also at my school, i do soccer&cheer. I really want to do competitive cheer but I'm SO not giving up soccer, soccer is my everything. And I emailed the lady, of the gym, and she said the competitions are october - march, so soccer should be over with.And one more question, I'm afraid if i go to this place, that the girls wont like meee. but i really want to do it.