Planet Elder Scrolls is a good place. But in truth, you need to learn on your own. To learn to mod a video game is a very personal experience. I even learned how to make a mod in the Oblivion Construction Set. Good times, I made a thief hold in the market place. Bitch was right beside where I fast traveled.
I enjoyed reading that. I played Darksiders and agree that people calling it the Dark Zelda are reaching a little bit. Darksiders might have the trappings of Zelda, but there was so much more thrown into that game. I'm not saying it didn't work, but while I played I was like, oh man, Devil May Cry Combat and Portals. And of course the Zelda touches. For me, it made me want to play a Legend of Zelda game. But that's just me.