Monetisation Ideas For Book Summary Sites

I've a book summary site, which get around 2000-3000 monthly traffic.
The site has 20 articles, and 11 months old.
However, AdSense wasn't approved for the site.

Most of the book summary sites seems like relying on donations + ads for some reason. But, I don't think donations would work, since I don't post regularly.

May plan is,

• Applying for Ezoic
• Adding affiliate links of Audible and Amazon

Do you have any other suggestions on monetising such a site?

I'm going to create a book summary site content in my native language too, the thing is I want to make a content on Youtube, and monetize it there, I'm wonder if I can use SEO tools, or use any other ways to promote my Youtube channel or not.