Oracle Identity Management(IDM) is a vast collection of products with confusing terminology and it can be difficult to understand where to start. Hope the below links help.
Oracle IDM Basics - (Keep clicking to navigate through entire topics)
A few simple Tutorials from Oracle to get started
Oracle IDM Home Page (Source to Datasheets, Whitepapers, Customer Use Cases and various Data)
Issues/Continuous learning of tricky use cases & finer concepts
Oracle IDM A-Team Blogs (Learn tricks of the trade)
Mapping of use cases with products
Collated IDM 11gR2 Blog Dashboard