It should only take a year or two to realize you’re in way over your head. Drop out. College makes a lot more sense for people over 25 (at least), anyway. The best part about youth is that it’s yours to waste and you’re just dumb enough to do it. Finishing college right away in four years is the quickest way to force you into a dull, grown-up life of 9-5 and business casual khaki.
Don’t take all the college at once. It’s nice to save some college for later, as you’re going to want it to go back to (maybe more than once). Getting kicked out for something simple like drinking or smoking pot is alright, but anything more serious may alert the law and/or mental health officials. Remember, it’s important to stay under the radar. Also, you can always TELL people you got kicked out in order to gain more credibility once you’ve moved to the nearest city and met your fellow derelicts.