Is this a join or invite only group?
You can join, however you won't be able to rp with the people here unless you have an app.
What do I do once I'm done with my application?
If you are unsure if your character fits the criteria you can send a note to the group and it will be handled. If you are confident you can just submit it to the Applications and The Judges will do the job.
What are the admin's roles here and what do the symbols at the side on the journal mean?
you can check here for the roles and the symbols
The Grey Dream
The Fountain Square
Donations would be greatly appreciated
Donate here~ --->