First step, if you don't got Drawpile then download it here. If there is no current room to join, in Drawpile go to Session > Host, title your session, enter your artist name in ID alias, select Remote and enter sureok.cyou to host.
Server is provided primarily by RAPIDPUNCHES for the benefit of those who are unable to host sessions on their own computers and internet (practically everyone). It has limited capacity, so please be considerate of others and try not to monopolize the available space. If you'd like to contribute to server costs just buy RAPIDPUNCHES a coffee.
Sessions hosted (or just listed) here should abide by the common community guidelines.