Kind of minor and I don't know that it counts as "reinventing myself", but I graduated from college at 30 years old. Prior to that, I had done mostly "lowly" fast food and warehouse jobs and didn't really have much going for me. My fallback was to maybe join the military and try to get something going through that, but otherwise had no real plans or ideas of what I wanted for my future. It's more than a decade later and in retrospect it still seems like one of the best decisions I've made in my life. I'm now in a career that I'm more or less happy with doing relatively important work and I have an actual chance at having some sort of retirement savings if/when I get a chance to retire (assuming we avoid the whole global climate meltdown Mad Max ending that it seems we're heading towards).