Don't waste your money on the CRJ course. If you have the money to blow then it may help you to be more confident in training and you possibly wouldn't have to work as hard as everyone else but it is a gamble. Each company does things their own way and it may conflict with what you already learned at your CRJ course. Actually it most likely will and the last thing you want to do in training is tell your instructor, "But they said to do it this way at my CRJ course." You will make a complete ass of yourself by doing that.

I know a guy who did the CRJ thing at Jet University and severely regrets wasting a ton of money once he realized he had to relearn things the airline's way. Jet University are crooks just like Gulfstream. Let the foreigners fall for their training programs and stay far far away.
ATP is more respectable but they still want your money and will tell you what ever it takes to get it so take it with a grain of salt.

The regional airlines today need decent pilots ASAP. Don't waste your money, just get in there and GET PAID to be trained their way. Good luck.