I'm in the same position as OP. I have an ERJ class date this fall, but a buddy of mine who recently finished training has me thinking CRJ would be better.

I live in San Diego. Obviously I'd prefer to fly out of SAN, but I don't want to wait four years to upgrade. Commuting to LGA for 8 months sounds miserable as well. PSP is 2+10. LAX is 1+50, I'm fine with that commute. I also have family I can stay with in LA. Talked to HR, I'm on the wait list with one other person for a fall CRJ class in addition to my ERJ spot, but there are no actual CRJ openings until next year.

Am I making a mistake by trying to switch to CRJ? Should I stick it out with the ERJ?

Not sure what the best decision is, appreciate any feedback!