This is an established theory in psychology. One model of depression is "learned helplessness". Something about your life has taught your mind and body that it'

This is an established theory in psychology. One model of depression is "learned helplessness". Something about your life has taught your mind and body that it's pointless to try. So literally anything that teaches you that you have agency is a counter to depression. It's probably best if it's a small thing, to start. I myself had a period where I "learned" agency by teaching myself vim shortcuts. I have wondered the same thing about exercise. It's a quick hack for learned agency. Very few people feel worse after a modest amount of exercise. Even a walk down to the corner store gets you a change of scenery, an amount of social interaction, and movement. It will improve anybody's day.