Folkopedia is run by a piece of software called MediaWiki ( the same one as used by WikiPedia).
Therefore the complete story of how to edit a page in Folkopedia can be found at the MediaWiki site. Editing help
For instructions on headings and lists etc., look at the MediaWiki Formatting Guide
For linking to other pages or external site, look at Links
The very simplest way to edit is to use the tools at the top of the edit window.
These will allow you to display:
[[An internal link]]
A media file
Some other stuff including a horizontal line.
We'll produce some further editing help information as we go.