Two leg commutes is the horror. May not be as stressful with positive space for 3 months after IOE, but still hell on the job for a two leg commute.

Is LGA do-able from COU? Yes. Is it advisable, especially after 3 months positive space runs out and dealing with current Envoy Rsv rules? You won’t understand until you deal with it. You can always put in a base transfer request to ORD or DFW on the E145.

From what I see on the CRJ RSV list you may not get to fly much being on bottom of the RSV list. It’s currently loaded. Your chances of getting the COU overnights on Rsv or as a line holder on a dying fleet gauntlet will be slim to none, and it will not make a difference in your QOL being on the CRJ.

Take the 145 or 175 would be my recommendation. You will get to fly and build some experience/ SIC time needed for upgrade.