I feel you Man! There are no quick answers but there certainly is a "Discipline" which if adopted can effect change.

First off, DON'T quit your job without having another already lined up. "A Bird in Hand is worth two in the Bush" and all that.

The "Discipline" comes from the "Yoga Sutras of Patanjali" which you can freely adapt to your life, like so;

  - Yamas - Regulate your interaction with the external environment. Change what you can and ignore (completely from your mind) what you can't. Make a list of both.
  - Niyamas - Setup personal habits to automate your daily needs. These are things like maintaining fixed work hours, eating at proper time etc. Make a list to follow.
  - Asanas - Daily Physical exercise (whatever suits you).
  - Pranayama - Daily Breathing exercise (learn to slow down your breathing and breath more deeply)
  - Pratyahara - Practice withdrawing your mind from unnecessary things.
  - Dharana - Practice repeatedly focusing on one thing.
  - Dhyana - As a consequence of the above, Concentration on the object of study arises and the mind becomes steady.

Note that the above listed activities must proceed in parallel and not sequential.

You have to Act and Do and not merely Read and Think. But the latter provides the fuel for the former. So in that spirit read and adapt what you need from Yoga and Western Psychology: A Comparison by Geraldine Coster - https://archive.org/details/in.ernet.dli.2015.189086