Miraheze help

MediaWiki guide (e.g. navigation, editing, deleting pages, blocking users)
Miraheze FAQ
Request extensions, logo/favicon changes and other features for your wiki
Miraheze wiki Help center
On IRC in #miraheze on irc.freenode.net (direct link; webchat)
Miraheze Community noticeboard - anything related to Miraheze, the community and observations on which you would like others' opinions.
Miraheze Stewards' noticeboard - for matters concerning any global wiki issues and requests for official actions.
Phabricator - for extension and/or configuration changes, bug reporting and other issues.