On Mediawiki, after you set up, how do you change the "Main Page" text thats on your first page? Add pages?

Answer 1

Changing the main page is the same as changing any other page. Just click the "edit" tab and start typing! Press save and that's all there is to it.

To start a new page, the easiest way is to add a link to it from an existing page by enclosing the name of the new page in double square brackets: [[New page]]. Then save the page and follow the red link to start that new page.