Help...a Newbie in WAAAY over his head.

Ok, so I looked at the TGE with this great idea that I could create games on my own for fun. I researched the product a little bit and went ahead and bought it back in June of 06. I haven't had the chance until recently to really dive into it until now (I'm in the military and I am separating in 2 weeks from the Air Force, so free time has been VERY limited). After looking at this thing I began to wonder if I need to take a few steps back, as I have no schooling in C++ or game programming (I do have two "teach yourself C++ programming" and "Teach yourself Game Programming" books though). I went ahead and bought the "The Game Programmer's Guide to Torque" and had it mailed to Me. I just started going through the first chapter in the book and I'm already running into some problems. The tutorial in the book on setting up seems outdated to me. First the CD that came with the book only contains the TGE demos on it. However, when I downloaded the TGE licenses from the site it seemed like it was the real engine. When I tried to edit some of the scripts it asked me too, I couldn't find any of the lines of code they were asking for. Oh, by the way I'm on a Mac Mini if that matters.
So I have two questions for anyone who can help me.

1. ) Am I in waay over my head and do I need to shelve this project until after I take some classes, or is this still possible for me to do on my own with the resources I have available?

2.) Is the guide outdated or missing some updates that have happened after the book was published?

P.S. Here is an example of the problem I'm running into....
The book says:
"Next, edit "main.cs" and change line 6 from this:

$defaultGame="demo";
To this:
$defaultGame="Prototype";

This will use out new "prototype" mod instead of the demo mod."

But this is what I see in the first section of the main.cs script.
//-----------------------------------------------------------------------------
// Torque Game Engine
// Copyright (C) GarageGames.com, Inc.
//-----------------------------------------------------------------------------

// Load up common script base
loadDir("common");

//-----------------------------------------------------------------------------
// Load up defaults console values.

// Defaults console values
exec("./client/defaults.cs");
exec("./server/defaults.cs");

// Preferences (overide defaults)
exec("./client/prefs.cs");
exec("./server/prefs.cs");

//-----------------------------------------------------------------------------


Am I blind, just not seeing something or do I need to use the licenses I bought from the website?