Welcome MarkyMark11. I was 55 last week, unfortunately (or fortunately) I still think I'm 23. It's not until I hear the noises I make when I stand up, or the aches I have the day after working on the car or the 'bike I realise my body's age.
My Dad retired at 55 and and joined the bowls and golf clubs, I started doing trackdays 3 years ago thanks to Earthcore. Going on rideouts and the banter on here with like minded delusionals reinforces the mindset.