I got hired at 44, after an almost 20 year career in ATC. While I never got paid to fly anything, I did have about 2600 hours then.

I'm not sure how much TT experience really plays in your success in training. Certainly, the guys that already had either flown the RJ (mostly from Mesa in my class), and those from other 121 carriers, probably adapted to the RJ sim the fastest.

It will be work for about 6 months, and after that, it almost becomes routine, but there always seems to be some surprise. Go for it.