[Clocks]

Don't take my word as gospel, I'm pretty damn new. Hopefully others will chime in too.

I did all my training at the university where I got my bachelors except for 2 addons to my flight instructor certificate which I did at ATP, then I instructed there.

Of the 8 people I know personally from my location who got hired at a regional who did some or all of their training at ATP one failed out of their airline training.

Will they teach you to pass the checkrides? Of course, every CFI will teach you enough so you can pass the checkrides, that's their job (the FAA even outlines everything you're responsible to know at every checkride called the PTS or practical test standards)! Will they teach you only the bare minimum to pass? There are some bad apples at ATP that will do that, and there are some bad apples at other flight schools too. But even the best CFIs I ever had didn't teach me everything. I like to think of each certificate or rating as a college class, the instructor is there to cover the topics and guide your learning, not to read verbatim from the book so every single topic is covered to the minute detail. You should learn a lot from your instructor, learn a lot from your own studies, and become a decent pilot because of the influence of both. A failure on the CFI's part can make it harder (just like a poor college professor can), but no matter what you are still at least half the equation and anyone who finishes training having only learned "how to pass the checkride" failed themselves as much as the CFI did (unless the CFI is just grossly incompetent and negligent). /end personal responsibility rant

If there was a reasonable way for me to work a second job I probably would (I even thought of groundskeeping at a golf course, or anything to get me outside). But here is how you'll have to explain it to your 2nd employer if you want to be honest with them:

"I'd like to work here part time, but I am only free 12 days a month (11 days when the month has 30 days, or less depending on your contract). I'll find out which days I am free a few days before the new month starts, and my days off will change every month and usually every week. My airline job can also make me keep working into my previously scheduled days off, and I'll get no warning about that so sometimes I'll have to call off with little or no notice. I'll probably be working weekends and holidays at my airline job too since I'll be too junior to get those off with any regularity."

That also assumes you live in base. Commuting to your pilot job can be a whole different ball game since sometimes you'll have to fly in the night before or fly home the day after, reducing your effective days off even more. If your second job can handle that, then yes you can work a second job.

Also please don't talk to the people at ATP about the industry or the "best way to go". I sat on those phones at ATP for a few weeks waiting for an instructor spot to open up like many others as a brand new never-taught-a-student CFI and didn't know jack about just about anything. I don't even know if the 3 "head phone people" (I cant remember their titles, James was one of them) are even pilots or ever worked in the industry. If you want to know about their programs then talk to them, but don't try ever think you are getting real career advice from them.