How to prep for IB/consulting job in college?

I’m going to be entering college this fall and was wondering what I could do this summer to get a better sense of the work in the different fields. I had zero experience with business in high school but am looking to potentially go into that field in the future. Are there any books, videos on Youtube, or anything I should look into to learn more? Also, when I do go to college, what extracurriculars would be helpful for me to learn more about finance and potentially network? FYI I’m going to a target school, but not a super target, so think like Columbia, Penn, UChicago, Duke, Dartmouth, Cornell, Georgetown level