How do i play with/against friends?

We are a group of 4 Dota players and we loved playing autochess back in the day. We’ve learned that hearthstone battlegrounds is pretty similar so we wanted to start a group/lobby to play with/against each other.

We tinkered with the game for hours but we can’t seem to find a way to do this.

Is it possible to play battlegrounds with/against friends? We don’t care if its only the 4 of us against each other.

Thanks in advance.