So I've completed the tutorial yesterday by doing Simeon's thing in Cypress flats. I walked into the marker and tried to join a game, but that gave me an endless loading screen so I ended up doing it with just one friend I invited.
Anyway, now I want to do some more jobs. I tried selecting one from my phone, but it makes me host the job. Then I can auto-invite people and hope enough people accept the invite. How do I join one that someone else is hosting?