The following PDF files contain descriptions of the SAP IDES environment. So, you can teach yourself with the installed SAP IDES System in a really good way.
Additionally, you will be able to understand the different IDES business processes, that are available in the system - fully described and customized.
Especially interesting for you is the detailed despription of the IDES customizing for the different country versions. So, even experienced users and consultants will gain useful tips in the IDES customizing.