Hi Yana. If you’re asking about finding readers, I literally just got out of a workshop with Zulie Rane where she spoke about finding trending Medium topics to match your interests.
One suggestion was to make a list of topics you’re passionate about, then search for “Popular on Medium” on the home page. I intend to do this myself to find long-term trend patterns. It takes a bit of research but seems like a solid way to see what folks are reading.
Another thought is to Google your chosen topic and see what kind of articles/pics the Internet gives you.
I hope this helps!