I've recently developed a keen interest in learning about Norse mythology, more specifically the events of, and leading to, Ragnarök. I tried to jump in with some Wiki surfing and looking at the Poetic Edda, but that ended up being fairly dense and tough to follow. Are there any good, "beginner level" sources I can go to to learn more about Norse mythology?
The Prose and Poetic Eddas are really your only options when it comes to Norse Mythology. If you're looking for scholarly discussions of them, Terry Gunnel is always a good option - he just finished putting together a collection on apocalyptic themes called The Nordic Apocalypse. John Lindow's got his Norse Mythology: A Guide to Gods, Heroes, Rituals, and Beliefs, which is a kind of cheat-sheet, but shouldn't be a crutch.
Also, starting with Ragnarök isn't really the best idea, as it's the culmination of the Poetic Edda, and references things that happened earlier.