Personal help.....just read if u want?

okay i was invited to go to sls(summer leader school) and i have to march a flight...and geez i dont know i have no self condfadence and i dont know if i want to go but i do...and i keep messing up on it and i dont know i dont want to go and pull are schools name down and mess up then get sent home a day later....i really suck at these things and now i dont think i can do it but i wanna go to prove my self and others to redim how bad i am at this stuff...