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A good way to start getting to know the product is to step through the documentation.
Start with OLE Basic Functionality and Key Concepts. A helpful glossary is one of the links there.
Each currently existing module has an overview section that is very helpful:
Select and Acquire: http://site.kuali.org/ole/1.5.2-SNAPSHOT7/reference/html/OLESelectAcquireMEROverviewForUsersRevised.html
Deliver: http://site.kuali.org/ole/1.5.2-SNAPSHOT7/reference/html/DeliverOverviewForUsersRevised.html
Describe: http://site.kuali.org/ole/1.5.2-SNAPSHOT7/reference/html/DescribeOverviewForUsers.html
Admin: need overview link
OLE Video Tutorials
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