I don't know about the regionals right now, but getting into feeder freight would be a good way to get hours while attending college. Some of the runs only fly 40 hours a month and the schedule is the same every week, so attending college at the same time would be feasible. You just have to hope your run doesn't close.

I know a guy that went from no training to the right seat of a Shorts in less that 12 months. He went to an FBO for the private pilot license and did the rest through ATP. I know almost nothing about ATP except that it worked for that guy.

Good luck