We welcome any content you're able to add, fill in, or revise, especially to reflect changes from the original game.
Getting familiar with the Article Guidelines and the Help pages prior to contributing makes a big difference in helping a new editor get settled. A lot of wiki syntax assistance can be found in the Help pages.
Don't know where to start? A good place to begin is by editing articles that are designated as stubs, incomplete, or works in progress. These articles need anything from minor tweaks to major overhauls, and anything you have to add would be appreciated! Once you're comfortable, you can take a look at the Wanted Pages, a list of linked-to articles that don't yet exist.