Hey! Always great to see a new face!

There's a bunch of great tutorials at <
www.agidev.com/tut.html>. I particularly like the list of all the commands used in AGI code (Section 4.4 in the Peter Kelly tutorial, if I'm not mistaken).
Another great way to learn how AGI works is to download as many AGI games as possible, then read the code in AGI Studio. You'll find plenty of interesting tidbits about view changes (like when a character enters the water), event handling, collision detection, just to name a few.
While I have yet to make an AGI game, I find studying the language to be great fun because you can easily create something great with a good story, and you don't need to be an artist to do it!