Our company was first introduced via a Proof Of Concept.  After that, a group of developers basically “Played” with the software to get used to it and advanced pretty well.
Onsite training from a 3rd party consultative organization proved to be the best benefit.  webMethods on-site training is very costly and seems pretty broad.
I suggest compiling a list of questions and/or tasks to have someone come in and show to how to tackle them.
Good luck!
#Integration-Server-and-ESB#webMethods