I'm assuming this step has been done or is in the works
As someone who is in his 5th year of retirement my adj were a little different(retiring smack dab in the middle of COVID). For me having a Railroad retirement pension, a wife retired as an Educator with a pension and living conservatively comfortable, money worries were not a real concern.
As for the actual decision to retire, for me, after a 47 year career, it was time to turn over the reigns to the next generation of railroaders. I did consult back for 6 months or so which did help in weening myself from the 'work routine'
Most importantly, as
@highfigh noted, keep and stay active. I have and now I usher another famous quote......"I don't know when I ever found time to go to work" !