Spinning yarn. Fiber arts in general, but spinning is very low effort. It keeps your hands busy while you watch something on TV (or if you're waiting in a waiting room) so you don't feel the urge to grab your phone. Drop spindles are also very affordable and probably the best way to learn. You could spin wool roving or top. You could also go forage a ton of wild nettle (do that it in the winter so it doesn't sting), process the nettle, then spin that. Or you could get into the dying process, which is super fun. It's an entire rabbit hole.

The fun thing is you can use the product of the low effort hobby in higher effort hobbies like weaving. And once you get fabric from weaving on a rigid heddle or floor/table loom, you can amp up the effort even more in following a pattern and sewing things from that fabric. Or just hang it and look at it.