All I can offer here is the opinion that retirement is a very personal journey. No matter how many stories one hears or how much advice is offered, we are still experiencing something uniquely our own story once we retire.
At first, my colleagues from the high school said I seemed like I was in mourning, even before I had left the building for the last time. They were right. I was.
Very soon afterward, I discovered I needed to learn how to slow down. After about a year into retirement, I was driving, one morning, to the grocery store and found myself rushing to get there. At a traffic light, I had a "eureka moment." I actually looked into the visor mirror and addressed myself, "What are you doing! Stop it! Slow down." After that, I never rushed anywhere again, and I do not expect to do so, ever again. Why should I? It's true - every day is Saturday, at least, for me. That's become my thinking.
And the period of mourning totally went away. Now, when I look back, it's as though - almost - I was never there, the classroom had become so distant and, almost, foreign a place. I have a new life, one which I pray does have Light at the end of the tunnel.
Frank
P.S. This hobby of ours has added immensely to my life: people; adventures; creativity; community; conversation; society; fun.