Unfortunately, I'm probably one of the older people on this post.....so my answers will be a little different.
1. Get B.A. and complete graduate school before starting your
life. I received B.S. at age 42 (2007) and will enter grad school this year (if I can pass the GMAT) at 45. Should graduate about the time my son finishes is grad work and my daughter starts hers.
Ahh what the heck, it'll make us relate to one another better...right?
2. "Boot Camp" is much worse than math, so go ahead and take the advanced classes.
3. I'd like to say ignore the girl, but after she gives you two children and 20 great years it would be rather unappreciative. However, I've told my son to ignore the girl. Does that count??