I am thinking about a career change...

Retired, disability, from the USPS. Not going to be of much help to you. But I can say the burnt out part is a drag. Hit the burn out stage about a year before being removed/walking away. Has I not been forced into retirement I was going to change crafts with the Post Office and become an ET. For me, the burn out made it very difficult to go to work everyday. Was far easier to pick up the phone and bang in. Nothing wrong with wanting a change. Just be smart, make sure what you are looking at next is something with some security and room for growth.