There's not a particular recipe or shortcut to learn it, you may treat it just as a mini-programming language with IFs, LOOPs and GO TOs, so a general familiarity with those is what you need.
For example, a beginner tutorial on programming in general, or on some BASIC like language, would probably come handy in giving you some nuts and bolts, and introduce you to the logic related to controlling a flow of actions
One, picked up at random, that seems a decent enough starting point could be this one here
Don't forget to follow the new official forum on http://www.voiceattack.com/forum/
, you'll find more organized sections including those dedicated to profile editing and such