new to netweaver

Hi,

Iam having 3 yrs of experience on ABAP programming and experience on configuration part of ALE (application linking and enabling), IDOC programming. As well very less exp on core java and knowledge of XML and EJB.

Now iam planning to switch over to net weaver XI.my query is which component suits me in NW either EP or Exchange Infrastructure?

Could you tell me? i want to learn on my own by installing XI or other. So how to start my preparation.

How to get the material and software ( i have the access to help.sap.com also)

Your help is highly appreciated