Hello friend, and welcome to Argent Dawn!
This is a guide about RPing overall, maybe not specific about how AD is, though! But it’s quite useful.
If you mean for OOC communication:
In game: Whisper (although used for IC aswell, sometimes), guild chat, general, trade, battle.net and alike are OOC chats, and not used for RP.
Outside it, usually Discord communities and forums, Argent Archives and alike are used.
I think you should bit elaborate about what you mean of channel.
But! Overall, /s , /y and /e are only for RP and IC talking, if that’s what you mean. And sometimes there are IC chat channels in discord servers, mainly guild servers, for this purpose.
But if you mean communities or guilds, to find people to RP with and do all the stuff, there are plenty of good ones around.
You can add me on Discord, so I’ll invite you to some of the communities: Lightbearer#8393
Overall, a good step to get into RP would be joining an RP guild, and there are plenty of good RP guilds out there. You can just say what kind of RP guild you’re interested in, and they will be recommended.
For example, as it says you’re a gnome, i suggest some Gnome guilds:
Assemblage of Uld
Arclight Association
Gnomish air corps
The first and most necessary kind of RP addon, are the profile ones. Using them, you can make a profile for your character, aswell as see others’ .
The most common RP addon is Total RP 3, which i recommend it aswell. There are also other ones like MRP and XRP, but TRP i used more than others.
There are other addons aswell, which can be useful, but they aren’t as necessary as TRP.
Joining guilds and communities is the first step to find people to do content and all stuff with. Feel free to add me on my Discord which i wrote above, so i can invite you to some communities, redirect you to what you seek, and discuss things further if needed. Overall, I’ll be happy to help!
Once again welcome to Argent Dawn, I’m sorry if i didn’t offer the best answers. Best of luck!