As a 65-year-old fitness trainer, Mariner, I approve your message.
As a 65 yr old fitness neophyte, so do I.
Good food, a little too much sleep and more exercise than you think you “ought to be doing” is the recipe.
No less than 150mins of low intensity cardio per week, with one HIIT session and a little weight training. Or, a lot.
Depending on what your joints can handle.
But still, more than the average person thinks they ought to be doing for “over 60”.