Interest in starting a nature book based book club

Hi all!

I was thinking of starting up a small online only book club based on non-fiction nature based books. I looked for some but couldn’t find quite what I was looking for (if anyone knows of any please let me know!)- so my sil suggested starting one on my own. She was nice enough to join lol 
It would be really laid back and low pressure. I have a son whom I homeschool and am currently taking care of my dad who’s in recovery after a hospital visit, so I definitely can’t run something super strict that meets multiple times a month. It’s also meant to be introvert friendly so lurkers are absolutely welcome. I haven’t figured out all the details yet since I’ve never done this, but I'm working on it. Thinking HQ might be Discord.

For those who started / run one of their own- How did you recruit /  find people? I see a lot of recommendations for recruiting friends but… alas lol and those I’m close to who I would ask don’t really have the time or focus for it, so it’s just my SIL and I. 
What platforms do you (or did you if you no longer do it ) use that worked, any that didn’t? 

These are some of the books I was thinking of starting with: 

• The Sound of a Wild Snail Eating  Elisabeth Tova Bailey
• Other Minds Peter Godfrey
• When the Earth was Green Riley Black
• Seeds of Hope Jane Goodall

Thanks for any advice, please don’t eat me ‘^^