You are doing the right thing by picking up the ATP book. Also going back to school is a great idea while you look for another job. Get that 4 year degree in something and you will see a lot more doors open. Find a flying job that is conducive to finishing college like skydiving or flight instructing where you can control your schedule. I left a G550 FO job to finish my degree, I flew as a contract pilot and finished school as fast as I could. The challenge and hardship was well worth it.