Watch this and how Paul Otlet used faceted categorization to create the Wikipedia of his day
Read pages 203-236, Categorization: Describing Resource Classes and Types. by Robert J. Glushko, Rachelle Annechino, Jess Hemerly, and Longhao Wang, in Robert J. Glushko's The Discipline of Organizing, MIT Press, 2013.
Pay particular attention to section 6.4 Category Design Choices and Implications. Ask yourself what choices you might make.
Again, think about what Bob Losee [page101-104] has to say
Pay particular attention to his discussion of representation and how controlled vocabularies may be used to describe the organization.
Continue to think about how you organize your information worlds