I did some tutoring in competitive math, standardized tests, and general curriculum. Did it for $80/hr (less per person if it was a group session), never as a full time thing just a few hours on the side.
Found people using all sorts of means. Did some adverts via wechat groups, tutored some people at my high school, later on tutored people from my college (after I graduated college), and also did some tutoring of random redditors. Overall found it pretty fun, I like teaching.