Hi Cees - You have always come across as a person who enjoys life and I am sure that you will equally enjoy your retirement. You have interests that satisfy you and I think that is the secret of keeping young, at least in mind.
You, in common with other members of this forum, enjoy music and I have always thought that if you enjoy music and particularly if you can make your own music then its as if you have a friend with you.
I used to wonder how I would keep busy when I retired. I can't imagine why, I never have time enough now to do what I want to do!
Good luck to you. Joan