I'd recommend keeping your day job while you train. This should be practical if there is a suitable school or FBO near you.

Unfortunately, full-time students are often at the mercy of Wx, Mx, scheduling issues, and other paying customers. Down time to a full time student is wasted time (and lost income).

But don't make the mistake of trying to fit career-oriented flight training into your existing life...you will end up getting busy and having long enough gaps in training that you will take two steps forward and one step back. This will cost you more time and money.

Your day job needs to be your first priority, flight training second. All other distractions need to go away...plan on not having a social life and get rid of the girlfriend/boyfriend early on (unless you think he/she is marriage material and will stick with you through ten years of ups and downs).