Please help! im scared to go to a new ballet school?

i have been doing ballet for 2 years and i was at a bad school so i dont know what anything is called i just mimicked the teacher and now my mom took me to a really prestigious ballet school only for ballet i went and the teacher seemed nice when she asked me to do things i was terrible! i was shaking and couldnt pay atttention it was really awful i was so scared so now i have a lesson on monday with 3 other girls whom ive never met before and to make it even more nerve wracking its a 2 hour cl and she put me in a group thats ALOT higher then me im sooooo nervous and its all ive been thinking about i hate having to do things by myself especially across the floor wich is one of my weaknesses i wont know how to do anything any advice?? thankyou so muchhh!