Organizing files in pages
How do I create folders in pages?
In the expanded Save…/Save As…panel (up-arrow selector adjacent to the folder selector) there is an accessory button for New Folder. When you click that, you give the new folder a name and note where it is located. When you click Create, clicking the Save button places the current document in the new folder.
Pages remembers this save folder location for future documents until you change it.
Pages isn't really a file organizer, and the Finder can save you time in that pursuit.