I didn't start college at all until I was about 20. I'm shocked that anyone thinks it might be "too late to turn it around". When I was 20 I hadn't even settled on a direction yet, much less decided I wanted to turn it around.
I started college at 20 too - when I was 18, I was absolutely certain that I would never go to college. (Strangely, at 15 I was absolutely certain I would never work for anyone else, which is exactly what I did in my gap year between 19 and 20. And all through college, I was absolutely certain I'd never work for a big company, which I'm doing now.)
