If you want to learn any of Oracle's tools/technologies,
you should probably sign up to their developer network:
http://www.oracle.com/technetwork/index.html
This will allow you to download a lot of their software, including proprietary enterprise products, for free on a developer-only licence. There are also tutorials, "Oracle-By-Example" (OBE) guides, and other learning materials, as well as lots of forums where you can get expert advice on Oracle-specific topics.