>>277945613
>how do I actually join?
It will be in the community tab, either "shitpost addiction therapy" or "join sparkly for free VAC ban". 
>How do I tell if I am mute in game
Ask people rather loudly since the voice volume is shit in Pavlov. Other than that idk.
>When I move in Pavlov, it seems to modify my movement vector depending on the orientation of my controller
There's a setting you can turn off for that, don't remember the name though but check the options.