getting into business

[sunnycalifornia]

im currently 18 years old, about to go to college, and im wondering how you guys got introduced to business/investing, etc. i'm interested but don't know where to begin other than read lots of stuff online. i can't major in business b/c my school doesn't have a biz school, but i'm interested in the stock market, in investing, in real estate, etc. how should I go about learning esp. since i'm just a complete beginner?

thanks