I need Help w/ show choir auditions!!!!!?

o.k. so this is my freshmen year in walsh and this will also be my first time doing show choir, dancing, singing. And im SO confused i dont no wut song i shud sing or how to put the dance moves in. plus what dance moves! im so unprepared for this. but i say the walsh show choir once and i was like wow taht seems like alot of fun so i wanted to try it( and im not the worst or the best signer for sure but i am an alto i think) So i just need ur help to choose a song a dance instructions PLZ! thanks!