I used to have a blog or two back in the day and two things I noted back then was:
1. If I figured something out that I hadn't found a solution to elsewhere on the net people would find their way to my site. No further SEO necessary. (I don't know if this would work anymore.)
2. Sometimes I would Google  a weird problem and find my own page.
: yep, that's what I did until three years ago or so)
FTR I never made any money on this. It wasn't that popular.
Also I recently started writing again at https://erik.itland.no just to contribute some stupid posts like those you'd find on the old web I used to like. Hopefully I can start adding some links to stuff I like to read as well, and deliberately not add any dum nofollow or other stupid CEO. My wesite, not Googles :-]
Could we have a tread were everyone who wants posts their imperfect personal web sites? Or has there been one and I have missed it?
If we all did we could soon have something really awesome going on.
If there ever was a good time to do this again it seems to be now.
This still works. I wrote about a topic awhile back o help me understand it and when I search for the topic, my post still appears in the search results.
I didn’t write it to get to the top of any search result but for myself so I could understand it. Now when I see the post there, I’m glad that I’m not the only one who benefitted. As other people have pointed out:
Write. Put it out there. Do it for yourself first and not to be popular. If it helps you, it might help someone else. And who knows, someone else might even point out something you didn’t know before.