Fiber arts! They’re for everyone, not just grandmas. Knitting, crochet, weaving, embroidery, sewing. The act of creating art lowers stress, and it really helps manage anxiety and depression. A lot of them also a mathematical or engineering approach, so if you find those things rewarding, you’ll probably enjoy fiber arts. And you get something warm or useful in the end…
I have a recent Paperwhite, and you can still do the drag and drop thing with it. The Kindle shows up as a device on your computer, and you just need to get the files into the documents folder on it.
I can’t remember off the top of my head if you can skip the setup with a new Kindle and not make an Amazon account.