Anyone can create an account for editing pages on the Win-Test wiki.
Please click here to create an account and if you have never edited pages using MediaWiki before, please take a look at the editing help page for help with editing pages/articles.
Getting further support — IRC and the mailing list
One can get further support by using IRC, a real-time chat platform; you don't even need to install any software to do so. See the Help:IRC article for more. Of course, there is also a very active mailing list which is the best way of getting answers to any queries you may have.