Taken as a whole, you're post doesn't seem like you want real advice, just venting/seeking approval/wanting validation...Well... good news...I'm going to give that to you:
You are sitting pretty, do whatever you want. Seriously, you're educated, have a good resume, have a good home life, you are financially secure. This site uses the term 'hair-on-fire situation' a lot; whatever the opposite term of that is, is you.
You just sound burned out of and tired of being burned by corporate life. So, F-them and do your own thing for a few months. Paint, hike, annoy your kids by participating in their lives, take up skeet shooting, read, take a class in something with no practical application--you're almost 50 and have raised 2 kids for the last decade and a half--there's a bunch of things you haven't had time to do--do those things.
As for this coding thing, seems like a knee-jerk catch-all reaction that everyone now a days turns to when life goes slightly sideways. Give it a few months, cross a bunch of the things above off your to-do list and then see if this coding desire is still there--if so, follow it.