I have been working on a book in InDesign and have been having some interesting problems, namely that world-ready settings use LTR punctuation at the end of a line or paragraph, causing me to be unable to move forward with my typography. I have also been unable to find the tool to set my document to paginate in RTL, rather than LTR.
Version of InDesign? Computer platform?
If you have installed the version or the plugins with RTL support, you find the with from LTR to RTL pagination in the New Document dialog as well as in the Document set up dialog.
If you are a Creative Cloud subscriber you can install a RTL version like Hebrew or Arabic additional to your English (or whatever language you use) version. You need to change in the CC app preferences the App language and install it additionally (without uninstalling). This will add this functionality and give you access to needed commands for your problem.