Hi,
Search on Google you will get lot of documentation on Webi and universe.
Some are
Official Product Tutorials – SAP BI Suite
SAP BusinessObjects 4.0 Interactive eLearning Tutorials
Official Product Tutorials – SAP BusinessObjects Business Intelligence Platform 4.x
https://www.youtube.com/watch?v=UnXeWHrzItE
SAP Business Objects Universe - Information Design Tool - YouTube
Official Product Tutorials – SAP BusinessObjects Information Design Tool
http://help.sap.com/businessobject/product_guides/boexir4/en/xi4_info_design_tool_en.pdf
Regards
Mustafa