High School Senior- What would you do differently if you had to do it all again?

I'm a high school senior who's most likely attending Michigan's Ross business school next year.

Throughout high school I have been in business clubs and have enjoyed learning about finance and the markets as a whole. Ross was the best program I could get into, but I am not sure at all what I want to pursue as a job. I have cousins/family who work very long hours on wall street and it sounds awful to me as of right now. 

Does Ross business school give me the flexibility to pursue a myriad of things post-graduation? Is it worth going to business school or should I be looking at different degrees/programs to make money?

If anyone reading this was going into college again, what would you do differently? (Minor in CS?)