Hey ghaelen,
The Archive can be a little intimidating at first. However, it works pretty much exactly like the forum in terms of writing material and using BBCode for formatting. When you find an article you want to edit (which you can do by browsing the list of tags
here, or through the search link either in the Archive's sidebar or in the links at the top of the site), just click the "Edit Article" button at the top-right to get to the edit screen. Once there, just treat it like editing a post on the forum. BBCode works the same there as it does here

.
There's a few extra BBCode tags that do special things in the Archive, but generally speaking you won't need to use them that much just for making quick revisions. The one you may end up using most is the article BBCode tag to link to another article. Just follow the instructions in the Custom Tags box on the edit page to see how it's used.
There's also some guidelines in the Archive itself for things like formatting, which you can view by
clicking here.
If you accidentally mess something up, don't panic. Just click on the Options button at the top-right and select "Article History". You'll see a list of revisions to the article, along with when they were made and by whom. Click the drop-down next to the revision just below the active one, and select "Revert". This will re-activate the non-messed-up version, and you can re-edit it again.
I'm currently working with OHB to build the Archive module that will be needed to complete the site upgrade, and which will ideally be bringing along some major functionality improvements at the same time. One of the things I'm hoping to significantly improve is citations, so you may want to hold off on focusing on those for the time being, just so we don't have a lot of work that needs to be redone before too long. I'll keep folks posted on what to expect regarding the upgrade as things progress.
As a suggestion on where to start, since the Archive is all kinds of amorphous right now, you might try expanding some of the
articles tagged as stubs, or the
articles that require images. Just start at the top and work on whatever strikes your fancy or expertise.
If you do expand a stub article enough that you think it's worthy of standing on its own, be sure to remove the "stub" template from the article text, and de-select the "Stub" tag in the tag list. Similarly, if you add an image to an article tagged as needing one, be sure to remove the "Requires Image" tag. The tag list is multi-select, so be sure to control-click (or command-click on a Mac) to remove that tag, or you'll de-select all of the other tags instead.
Somewhere else to look would be to read over any of the stuff in
Journals or
DRC Research and make sure everything is spelled correctly, because I've caught a few transcription errors in the DRC notebooks in the past, and there's bound to be more of them (I know because I typed most of them out myself

). If the misspelling is in the original document, be sure to add "[sic]" beside it so we know going forward that it doesn't need to be corrected.
If you need any more help, let me know

.