I soon found Digital Ocean's writing program. They were paying $200 for blog posts, which was a lot as a student in South Africa.
Money was fairly motivating, but soon the long and slow editing process got tiring, so I started freelance blogging for a few other sites instead.
Then I created GitHub page[0] with links to places that pay for writing and links to some resources I enjoyed for learning how to write better.
Now I'm convinced that the fact that more and more companies are paying amateur bloggers for content means that there's a nieche for more professionally written content, so (shameless plug) I launched Ritza[1] (I'm focussing on it full time from today only, so it's still very rough!)
[0] https://github.com/sixhobbits/technical-writing/blob/master/...
[1] https://ritza.co