No knowledge of HTML is required, only the simplified wiki markup which is used to structure and style the page.
You can start right now by clicking on the edit link that is displayed on every page.
To edit a page, all you have to do is type your article as you would any other page, and use the simple guidelines below to create the desired styles.
Wikitext is designed to make it as easy as possible to type an article and style it at the same time, without having to worry about long and sometimes-confusing HTML codes.
Edit summary Edit
The edit summary is a field where you can summarize the changes you are making to an article. You are Encouraged to fill this field whenever possible, because it helps other contributors who are browsing the Recent changes page to know what kind of changes have been made.