I like Cypress better. Nixon makes me think male, and it also has some bad connotations. :/

I don't know about the seasoning, but I know you're supposed to do that for leopard geckos. Also note she'll stop eating from roughly January to March, which is breeding season.

It's actually better to feed both mice and rats. Mice have some nutrients that rats don't, and vice versa.

Keep your boots on. Spend a lil time with the one you got before you start thinking about getting more. I almost made the same mistake recently (I've had my ball for a lil over a year), but the good folks on here quickly talked me out of it. Then again, I was looking to do it through college, which is not a time to be getting into such a costly hobby.