There's also people who are willfully ignorant about things that are too taxing for their mental health, such as the war in Ukraine. Some people think it's very important that everyone knows the details on what is happening, but it might do more personal damage than good on individual who is already struggling with stress, depression, anxiety etc.
Any kind of exercise. Don't need much thinking to do things like walking, yoga, body weight exercises. It's even encouraged to let go of your thoughts.
I also have one just like that. It's very similar to holding a toothbrush, so it's easy to use- especially if one has motor problems or other ailment/sensitivity in hands/fingers.
There's floss with kind of a fishing line in one end of every ready-cut piece of strand. Oral B Super Floss is available where I live. You can use the rigid line to guide the floss under the retainer.
In case you (nor the dentist) haven't tried, there's also flat floss that's like a strip of paper. Oral B Satin Floss is one that is available where I live. Hope it might be of help!
There are tools for this! Little brackets with floss already in place (in several shapes, the floss straight, sideways, or in angle, long or short handle) or bigger ones where you can manually wind the floss around.
I just realized Schnoodle got left behind as well : (