Hi, Meg!
That sounds like fun! Of course, there's going to be a lot of equipment vocab and I'm sure that the stunt folks have a verbal shorthand. One of the biggest things I remember is learning patience. I don't know what kind of stunts you'll be doing, exactly, but as soon as many of then end everything needs to freeze until the stunt coordinator and/or paramedic make sure the talent is okay. Sometimes they'd move in so quickly that I'd feel sure something must have gone wrong, but they were just being efficient. I can't wait to hear more about what you'll be doing!
LiLz