I am happy to read about your progress on Medium. Good job! :)
Just to add the last comment to this conversation, the article is about SEO, ranking in organic search, and bringing traffic to the blog from Google. SEO does not work without keyword research, unfortunately. It's essential to analyze the keywords to rank.
Medium is a completely different universe, which has nothing to do with SEO. Like you, I write about the topics I like, without thinking about SEO. Medium has a built-in audience and content distribution system, but Google works differently.