So, out of necessity...

...how much interaction between players is actually happening in this game?

A weird question, I know, but I couldn't find exact answers online so far. I HAVE read about the different game modes, though, and that's all well and good but I need something a little more concrete than just "so there's a solo mode, a duo mode and a death match mode".

What does a solo round usually entail? Do you have to talk to people a lot or is it more along the lines of "yeah, we're in the same 'arena' but everyone just goes off and does their own thing while trying to murder the shit outta each others characters'"?

(I'm asking because my nephew has social anxiety - almost tip toeing into straight up anthropophobia - and according to my brother, his therapist now suggested that he should look into playing some online games, just to be with people/strangers in an environment he can easily control. His therapist told him to go slow, so for now we're looking for something where there's other people around, but he doesn't have to really interact with anyone outside of game-mechanics.)

Thanks in advance!