How can we avoid duplication? I've been contributing, but there's just so much I can do, and if there's no consensus and collaboration, it won't be much fun.
Duplication, how? Between articles here? Between here and other places?
As to the "so much [to] do", that's just what these encyclopaedia projects look like in the early days. It looks like you'll never get done, there's so much to do, and there's no way you can do it all. Don't worry about it - Wikipedia looked like this in the early days, too. Just do what you can, and don't worry about what you can't.
Noel