Gary has a good point. I am also 81 and try to do as many activities as I can that are not easy and challenge the brain.
A decade ago I bought some old telegraph sounders, and designed an interface so I could drive the sounders with off the air signals, like ARRL code practice. It was a bit of a challenge, but soon learned to decode the clicks and clacks of the sounders and even got an ARRL code certificate, I believe for 15 or 20 WPM. That was too easy, so started to learn land line code, American Morse where 1/3 of the letters and numbers are different. Again a challenge, but I was surprised when I went to a Dayton convention, I could read the sounder demo in American Morse perhaps 95 % accurately. Alzheimer's is in the family and genes, so I try to challenge my brain as much as possible. Tried a serious contest entry a few years ago, but was swamped by all the fast code which was easy a few decades earlier, so my next project is to get some high speed practice and just jump into a contest like I did in the ole days over 60 years ago. So the challenge is worth it, even if CW is "not your cup of tea"
Cheers, Rick KL7CW