The first thing we suggest is that you create an account. This gives you an identity in the community, and gives you extra abilities and features too! Your account will work for the whole of Fandom, so you only need to make it once and can use it on any wiki.
Now that you are a part of the community, you are able to edit and contribute to almost any page across Fandom. For some introductory help, try our editing tips page.
If you have questions about a specific wiki, start by contacting your local admins. You can also ask general questions to other community members on the community forums.
Remember, you can't break a wiki, so don't be afraid to get started!