Ask HN: How to find people/blogs in niche topics?

While finding good blogs, in general, seems to be very hard, finding good and interesting blogs about niche topics is just blind luck to me. For example, I'm very interested in the topic of exploring new ways to teach computer science and math (taking into account different mindsets, ways people learn concepts, the importance of empathy, etc). The blogs and people I've found all come from random topics on HN and Reddit. I wonder how many links I missed over the years.

How do you find interesting people to follow?