I'd also be up for editing. I'm a big stickler for grammar. You can be sure that under me there will be no apostrophe misuse!

And that the word aperture will be spelled aperture, not aperature (sorry dweller

). I might also be able to write something, but I don't know what.
The idea of making it a wiki sounds interesting as well. But I think that to make it clear and understandable to beginning users, we should not go about fiddling with articles too much once they're completed. An important part of a beginner's guide IMO is to make sure that everything is well-explained and laid out so that it flows in an easy-to-comprehend manner, rather than having a freely-editable mishmash of paragraphs and sentences all from different users.