The following pages might be useful to get started using this wiki:

FormattingRules explains how text can be formated in a wiki,
SandBox can be used to play around and try things out,
WikkaDocumentation is the complete information for this wiki and has some more advanced info on the options available,
OrphanedPages lists all pages that are not linked to,
WantedPages shows pages that are referred to but do not exist. These might be a good starting point for your contribution
TextSearch search function for this wiki.