LearnJDE is a official Oracle platform about JD Edwards resources.
Few days ago, the web has been renewed with more resources, UX, skinning and structure.
Probably it's the best platform and the most updated to learn JD Edwards, contains +1000 Documentation, +400 videos and tutorials, white papers, Digital Transformations (Mobile, IoT, UX One, JDE Cloud, etc).
You can see here: http://docs.oracle.com/cd/E84502_01/learnjde/home.html
Let's go!