Some general advice on what to do if no one is in the hangout:
1) wait - people check in to see if anyone's there pretty frequently, but if theres nobody there they leave - be the person there. You can turn off your mic/cam/screen share until someone shows up to save CPU or whatever.
2) Turn on desktop notifications, this will let you know when someone has joined the room (you might have to make an account for this I dunno)
3) Bump this thread, say you're in here and what you're up to and people might follow you in :V (Lets not abuse this though, excessive bumping is against the rules.)
4) Invite some people you know (ideally they're also comic people or at least artsy people.)