Any tips for someone playing in a new team? i don't know ANYONE on it...?

ok so my MAIN problem is that i have only been playing softball for like a year and a half and i have already been picked to play for an ELITE showcase travel team! well, i was so excited when i got accepted but when i went to the practice, and i saw the girls playing, they were amazing! they have been playing since they were 4 or 5. and this is an 18u travel team, my biggest problem is that i'm so intimidated by them, and they have known each other since they were like 10 and i just feel awkward around them. and to make matters even worse...i broke my left (throwing hand) middle finger right before the practices began. and i have two sprained joints in my back and i got strep throat in the first week of practice. i mean the coaches must have picked me for a reason, but i feel like they're really regretting their choice. i just need tips on how to get my confidence back...i used to be such an amazing player and now i feel like im falling apart. any advice helps. lol i'm desperate