If you wish to turn your brain off and pass some time then you can’t go wrong with either Destiny 2 (which is free-to-play) or Borderlands (1-3 it doesn’t matter) These are fun games with extremely addictive gunplay and all of them have Classes/Roles systems. I’d say test the waters with D2 with its fun customisation system (transmog, armour colours etc) and if that is not your cup of tea then go for Borderlands which you should find pretty cheap.