OP,
I agree with everyone else, get your private first while keeping your job. No need to rush the career change.
I'm just a few years younger than you but in the middle of that process myself. Spent the last year and a half finishing my Instrument, Commercial and CFI while working my full time engineering job.
By the way, I also live in Atlanta and work as a CFI at PDK (part-time for now but about to go all in). In your situation and given your background, I would advise against ATP. There are some much better and cheaper alternatives around. Pm me if you have any questions regarding flight training in the Atlanta area. Happy to help. I'd also be curious to know where you're going for your intro flight!