Hey Rae, working with "sharks" comes with the territory when your paycheck depends on what you sell. Just don't let them intimidate you. I'm very quiet and non-aggressive but I learned that you have to make it clear from the START that they cannot take advantage of you or walk all over you.
That said, you're going to have a lot of fun and I see you moving up the ladder quickly! Get to know the personal stylist manager and start dropping hints that you'd like to be a stylist eventually. Also keep an eye out for FNL (future Nordstrom leader) classes. I never went through them, but I wish I had.
Also, Nordstrom managers are very helpful. If you ever want to transfer or do something else, they're usually very supportive. I've never had a problem and I went from a couple stores and departments, to eventually the CS department (now the Sales Experience team).