I want to try out for my school's soccer team SO bad, but....?

i am INSANELY intimidated by the other girls that are already on the team. they're the popular preppy gorgeous ones that ALL the guys chase, and basically i'm just considered an outcast. but i'm pretty good, i'm a fast sprinter and great long-distance runner, i've been playing since i was 6!! (15 now) so i want this SOOO badly, but the girls scare me ha. how can i get over my fear? also, i can get "stage fright". meaning when i'm on the field and there's a lot of people in the crowd, my legs start shaking and i can't think and i look like a total idiot. how the heck can i get over this?! i have the skill, my fears just getting in the way :/