You have a running zena installation and want to post content ? Read the user’s manual.
To learn what zena is capable of, look at the features. For an easy introduction, we recommend looking at the zafu tutorials.
In order to fully manage zena as a designer, you should first have a good understanding of the unknown link and how templates work to render the content. You could then jump into the details of zafu, either by reading the documentation or by looking at existing skins.