First, it can be a great way to explore the technology stack. For instance, getting some intro tutorials on WebLogic, Linux, and Oracle RDBMS.
Some of the Hyperion articles are in depth and cover a lot. They are rich with screenshots.
The main Oracle Learning Library site for Hyperion is:
Basic install instructions detailing how to scale to multiple nodes.
Installing and Configuring Oracle® Hyperion Financial Close Management 22.214.171.124.000 in a Multi-Node Environment
Basic knowledge for training new recruits.
Intro to Financial Management
One of my favorites...
Deploying and Configuring Data Relationship Management Web Service API
Oh, is that how you're supposed to do it?
Installing and Configuring EPM System 11.1.2 with SSL Enabled on All Layers
Getting up to speed on those pesky task flows...
Automating Tasks in Oracle® Hyperion Financial Management, Fusion Edition 11.1.2