We hang out on Discord!
I already use Discord:
Awesome, here is the Discord server invite link
I've never used Discord before:
Discord is a little like a forum, but with instant messaging
There are servers, these are groups of likeminded people
Servers can have multiple text channels for different topics
Discord also has voice and video call capabilities, amazing
And it's FREE!
Firstly, make an account
Now you can download the app (It's only a small download)
Or
Access Discord servers in a browser (I'd recommend Chrome)
Join our server using our Discord server invite link
If you get stuck, try Discord's 'Getting Started' articles