i welcomed retirement. And I am the most gloomy and pessimistic person you could meet. I did miss saying, when asked "what do you do" and replying, 'well I am the Head of ...it took me a year to settle in to my new retired role. And now 20 years on, I am still here, still gloomy. But now working to someone else's rhythm is long forgotten.
Your mood will pass. You will eventually understand yourself better, and reach a state where you don't give a shite what others think of you. And providing you have adequate funds, you have the freedom to choose to lie in bed and wile away your life, or not.
I have been to Buckingham Palace, as I took up a 'cause' The food was good. But the state of the lawn was a surprise. People say all sorts of IRRITATING stuff to me ( such as you are as young as you feel) etc It's in response to my age, And I often think "F" off.
I only wish I had said it a bit more when I was 60, your age ,