I'm 54, I've been fully retired for 4 years. I also retired from my primary career at age 40. Granted it was earlier than I planned by 7 years but I had planned to retire by the time I was 47 and was on the way. I could have retired normally at age 42 had I not been disabled on the job.
I started working again since I was bored silly. Now that the wife retired almost 4 years ago, at age 55 BTW, both of us are fully retired.
Perhaps your expectations need a reality adjustment. Life choices are just that, choices. Decide where you want to be then work to get there. Education is not necessarily a one time deal and continuing it later is possible as are career choices.