If you need any assistance, leave a message on my Miraheze Meta talk page. I will respond as soon as I can, and available the majority of the time. I am also almost always available on IRC. I can also be contacted from the Miraheze Discord in the IRC relay channels, particularly #miraheze-relay or #miraheze-sre-relay. If you need any configuration changes to your wiki, please create a task on Phabricator, and myself or another Miraheze volunteer will get to it as soon as we can.
I also have developed my own skin, which is deployed to Miraheze, called Cosmos. If you need any assistance, regarding that, I recommend you leave a message on its' talk page at mediawiki.org, or asking on it's Discord server (invite above). Thank you!