Eirlys, I loved your post. At 55, I am feeling humbled by signs of age that, when I was younger, I thought would not be an issue.
I also have a neurological illness that has lately begun to affect my mobility and balance, such that I now move like a much older person (slowly, carefully) and will probably soon benefit from using a cane.
I am not facing these things with admirable equanimity, but rather with disbelief.
Here's what I have come to realize. Many women have bought into an idea that we're not supposed to be seen unless we're young and quite slim and stunning. I have a friend in her 60s who underwent abdominal surgery and then removed her bandages before it was time because she had a wedding to attend and wouldn't go without putting on industrial-strength Spanx. I didn't realize that I too had internalized some of this attitude until I saw it in others.
At 88, you've seen ideas of feminine beauty shift over time. I feel we're now in a moment when there is more room than ever for all types of looks, and when women are pushing back on the idea that being conventionally "pretty" is the only thing about us that matters.
Also, when I feel insecure about my looks in any way, I always find this song comforting
https://www.youtube.com/watch?v=3BWQ3KHk_QE