Hey Adrian! Glad to have you on BP. Not many youngsters on here.
College is a waste of time if you have entrepreneur in you. If you can hustle and work smart, forego the 4-6 year time trap. You will not use it anyway if you have those qualities.
In terms of learning, you need to LEARN HOW TO LEARN. If you can do this, you can do anything.
Since you are young and have time, I would do the following:
1) read, read, read
2) purchase your first property at 18. Don't listen to other nay sayers. you can do this at 18
3) Figure out how to establish credit as a 15 year old (co-sign with someone)
4) Save for your first deal. You could get a minimum wage job Luke everyone (I dislike this), work construction smertime and weekends, or I like what someone mentioned above and try to bird dog deals.
Most importantly, you are different then other kids your age. This is great. Most people don't worry until they are 30 to think about this stuff. PLAN ON BEING DIFFERENT. My dad always said "find out what everyone else is doing, and do the oposite".
Good luck my man!