Hello
@ivinity,
To be able to duel in the dueling hall you will need to speak to the
Arena Selector NPC (looks like Droobledore). I have attached a picture if you click on his name.
Once you speak to the Arena Selector he will open a GUI. This
GUI has all the Dueling Halls that you can visit. You and your friends must simply select one of these halls, for example
FFA, and you will be teleported there.
Everyone must click to be teleported.
You and your friends will be teleported into the Arena. If you wish to leave and spectate you can speak to the
Leave NPC and this will take you back to where you started. What you will have to do is run either to the left or the right and find the dueling hall that you wish to spectate.
Returning to our example; the FFA Arena is on the far left, so you'll need to run to the end of the left hall
Hope this helps, if you need anymore clarification please do not hesitate to reply here or make a ticket in game with the command
/t create and a team member will happily help you.
Happy dueling!
Kind Regards,
Harrison.