How to use orderby under public function find

I have two pods A and B both of which are based on advanced content type
I want Pod A is dispalyed ordered by a field called book_number and Pod B is dispalyed ordered by a field called movie_number.

How should I make it? I notice
There is some codes under “public function find”, ‘orderby’ => null,, should I modify null directly or add more codes?
I’m not a programmer, so please help explain how to achieve it in “public function find”, thanks

https://wordpress.org/plugins/pods/