If you want to discover how ARA works, you can follow the image below, then add a new Type,
Put a name and version
Remember to activate after a creation
Then create new application, you will see the type you just create before.
If you want to go with easy way, then install WebSphere , Jboss, WebLogic package from marketplace https://marketplace.automic.com/ then they gonna create the new type for you.
Hope that helps