CMS - Filtering by Age & Category

Hello,

I am creating a page with a list of diverse books for a charity website I am creating.

I have CMS Collection of the books. But I want to reference them with a category. IE Religion or Topic,
And then also reference them with an age range

Then have a drop down for users to select a category or age range - or both if they wanted to narrow it down. And then the page would only display the books related to the reference they’ve selected.

Can anybody help? I can’t seem to figure it out.


Here is my public share link: LINK
(how to access public share link)