Great article. A bit worrying that your increased writing, views and reads did not significantly increase your earnings.
Just out of curiosity, did you use AI to write 40 articles in 28 days?
Regarding finding your niche, one of the best advice I saw from a Super Writer on Medium was "Find your voice, not your niche" when you are starting out. I personally cover three niches- health, marriage, and personal growth and I'm okay with that for now. But, I will be happy to narrow things down in future depending on where I gain more traction.