Got the files from the outgoing designer today. I've gotta say, the nuts and bolts of the design looks very doable. As I grow into the role I'll be able to see and suggest more ways to improve the publication (hopefully).
But the putting-together-of-the-thing is definitely something I can do. The extreme up is the experience in putting together something that is really used by real people for real communications. You can come up with make-believe designs all you want, but there's real weight in real-world things.
And the Sierra Club is a cool organization with goals I agree with. So I'm also helping to try to leave the world a better place than when I found it! How great is that?