I have a couple articles on this same topic I think you might find interesting. I've been doing the same thing for years.

I'd be interested to learn more about the Kirkus opportunity. Could you write more on that (maybe tag me in the article so I can see it when you post)? Who do you approach, what is the selection process like, what is the pay like, etc?

Thanks for this useful article!

https://writingcooperative.com/5-ways-to-make-1000-a-month-writing-7594cc40a8e4