Friend games/practice

***posted this in questions but realized that seemed to be more about tech issues/bugs.

I’d like to know if there is a setup that allows for me and friends to play without affecting stats (ELO, experience points, etc)? My bro and I play a lot but now we have some friends and my wife who want to play and learn but aren’t ready yet for general online play. So we’d like to play with them but in a setting that doesn’t affect stats. I thought sandbox mode would do so, but last time I tried, one of us quit and we got exp for it. Thanks.

**We only play Custom (we don’t like random maps and certain win conditions), so that’s the ELO we care about.