I have audition tomorrow and I am kinda scared.

So I am 16M still in highschool and I have a program for a crown show in our school based of the book.I will act with siuletes,it's a solo act.So tomorrow is audition and I have 3 weeks left to prepare and memorize moves and text.I am really nervous and scared this is my second time acting infront of a lot of people.If you could gave me some advices I would appreciate.