An example that I can think of is Teaching English as a Foreign Language (TEFL), which requires a relatively short online course (for a fee, of course) and entails teaching basic english to kids from non english countries online. I’ve usually known of older and elderly people doing this but I don’t think that’s a requirement or anything lol. As far as know, the only requirements are high school English and the teaching English course.
Are there any other of these sorts of online jobs that maybe require a short course, and at least potentially bring in enough to pay for the groceries?
I want to mention this disclaimer, though: right now, at least in tech roles, it’s currently very difficult to actually land one of these jobs. Listings are getting hundreds of applicants per hour on some occasions. There’s a lot of competition because of recent return to office mandates and layoffs, and it might be awhile before that changes.