Random points:
1) Two years ago, I actually spent a fair amount of time in a library researching and then applying for/ signing up for, several online tutor services. I was 'accepted' into all of them, set up my blurbs on their sites, etc., and got exactly one hit, which was a scam. The guy in question wanted to hire me to tutor his kid, but insisted I send him my SS#-- this sounded hinky to me so I emailed the tutor co in question and they told me that it was a scam, this was never the way they did it, and they got rid of the guy. That obvious bad experience notwithstanding, literally no other hits from any of these services, in two years. I am not sure what else I could do with these services to increase the chances that I could get a gig, but, again, in my area, there is likely to be little if any business here, and, while of course I could do online tutoring, now that I have the computer and Zoom experience, there are only limited options for this, and much competition, many with loads of experience.
2) I am not a sales guy. Really, I ain't. Sue me. I am doing the best I can, but this idea is really just a pocket money idea, with no likelihood that it would ever be able to become more than this. Anyone who looks at my resume can tell what my background is, what my strengths are, but they would have to look at the resume to see it. But it was hard enough for me to even write the resume according to the (apparent) 21st century expected standards of braggadocio (according to the expensive career counselor I hired 3 years back)-- I did this, but I am never going to like doing this sort of thing.
3) Enough with the classist criticism of my unwillingness to spend money I do not have (which of course is not even unwillingness) in the vague hope that I might get a few bucks' return from that investment. If I had money to spend like this, I would have gone back to grad school to try to make myself more marketable, but I do not, so I won't, and all the more so since, at my age, it would likely not be useful anyhow.