If you want to commute from the west coast, SkyWest is your answer. Shuttle's bases are LGA, ORD, ATL, IND and CMH. You'll most likely get LGA out of training, which would require a bus or train ride from JFK to complete. The only bases that might be commutable from LA are ORD and ATL, but flights from the west coast seem to have high load factors and a bunch of nonrevs, all of whom will be ahead of you in priority. Also, ATL and ORD are senior, and you will be on reserve for quite some time should you be awarded one of those bases.

Congratulations! I hope whatever you choose works out well.