As you mostly know Xen is open source industry standard virtualization. From http://xen.org:
The Xen® hypervisor, the powerful open source industry standard for virtualization, offers a powerful, efficient, and secure feature set for virtualization of x86, x86_64, IA64, ARM, and other CPU architectures. It supports a wide range of guest operating systems including Windows®, Linux®, Solaris®, and various versions of the BSD operating system
The term “guru” may be controversial, but even if you want to become an expert, you should always go into the source code. Therefore yhe best way to begin is to get the latest source archive of Xen, build and install it. Give it a shot!…