the server is scheduled for release at the end of this month, but if you'd like to access it earlier without working on the server you'll need to buy a rank, but if you'd like to help the server by working, (quest writing) making the server move faster you can apply for content creator on karma.direct.
There are also other forms of CCs such as builder, command-block creator, configuator, and some more I forget the names of. But if you are interested in any of those here is the link to apply https://www.karma.direct/ccapplication
Sorry in advance for any spelling errors above. Attempting to this on a phone and I just woke up.