i had 1 or 2 of these types of career shifts in my career. i find the older i get the harder the drastic change.
most recently was 5 years ago, i made a switch but built off of the skillset i already had. current job was equally busy, but the grinding pressure wasn't there, which allowed me to relax and flourish, allowed me to learn more and grow, which kept me engaged
my wife told me that i had a personality change, i seemed happier. that's not to say i didn't enjoy or wasn't happy at my last place, i could have worked until retirement there. but i think the pressure of that job, i took that home with me and it showed. maybe not to me, but to those around me.
if you want to make a switch, i think you should look at what you want to do career wise for the long term and make a choice based on that. switching from graphics to car sales, do you have a plan/goals for the auto industry for the next 5 years, 10 years?
what are your interests? what do your strengths?
i'd love to get a red seal, but with my office hands i'd lose many fingers
so I know my strength is best on a computer or table with a set of drawings and found my place there.