Read our policies, if you haven't already. You'll be informed on the do's and do not's, as well as some guidelines when creating new articles, the Recent Changes Patrollers specifically watch out for people that don't follow these rules, vandalism is very easy to revert.
The Sandbox is a great place to test things out if this is your first time editing wikis. It is advisable to know what is commonplace on the wiki, such as templates and categories, and how to use them, if you have questions you can contact:
Questions? You can ask at the Help desk, the "discussion" page associated with each article, or browse through the help directory. Feel free as well to ask on my talk page; we take our time to help New Users! Feel free to contact an administrator for help; sysops' names are highlighted in green and bureaucrats' names are highlighted in cyan.
Have feedback? The War Room is used to discuss changes to wiki or other community related issues. You'll need 50 main space edits to vote, but your opinion is still appreciated!