I have discovered you can follow hashtags, which is basically how you can be your own algorithm.
I don't know how you do it in the apps, but in browser:
(1) click on a hashtag you want to follow,
(2) at the top of the list of posts with that hashtag is the little person symbol (see pic). Click it. It will turn the + to an x, that means that hashtag will now show up in your feed.
