I never finished my first attempt at college. It wasn't a waste though, during that time I found out exactly what I wanted to do and later I went for it and finished it. Actually a lot of people do that here. Take a year or two of university then switch majors, etc. (I hear that's different in some places in Europe where they push kids into vocations during grade school.. that sounds pretty shitty to me quite frankly! I know kids who didn't care at all about school till grade 10 or 11 and as soon as they tried they aced everything!)
You're asking the 1,000,000 dollar question though
Finding the balance between what you want to do and work.. and how to feed yourself in such a way that you won't be working at McDonalds in your 70's. It's hard.
Find something though. You don't want to end up without an employable skill, otherwise you really WILL be working for the man (twice as hard at a fraction of the wage) and probably hating your life especially in your 30s.. speaking here from having seen a few of my mates who isolated themselves, they all ended up trapped, working their asses off for next to nothing, living from paycheck to paycheck, not being able to afford even a trip to see people they care about, and becoming even more bitter and isolated. Yikes. (And never mind if you decide someday you actually want a family or relationship, or help out your parents when they get much older.)
If I could go back in time with my experience I have now, I might actually have finished and even aced my first attempt. I think during my 20s I became a lot more patient, learned how to treat myself better mentally and healthwise, figured out much better study habits as I learned HOW to learn. I don't know. When I dropped my first college courses I hated them so much I couldn't even stand looking at them.