I'm not familiar with it too, but I guess your first questions should be general enough to be able to answer them without detailed knowledge of the code itself.
What do you want to know? How to catch events? Addon structure? Guides?
If I may give you a hint: Don't use dynamic frames for your first addon if you are working on a gui. The widget methods are kind of incomplete and you might notice stuff like editboxes freaking out, properties being unsettable, etc...