If I had to give advice to anyone starting, it would be to do your research and seek out support. I was lucky enough to find this forum before I started dancing. I spent like a week pouring over everything before I auditioned. It was so helpful to me. Make sure that you know what you are getting into and make sure you know your rights. I remember the best piece of advice I got from someone on here was something along the lines of:
"Don't do anything that you aren't comfortable with, even if a custy offers you a lot of Money. If you give an inch they will take a mile. And don't feel bad about it either."