This is the official wiki for The Homestuck Tabletop RPG! http://www.mspaforums.com/showthread.php?33724-The-Homestuck-tabletop-RPG-(v1.1)-Come-check-out-the-new-PDF-playtest-version!
This is your new campaign homepage. The first thing you should do is invite your players. Click on the ‘Manage Members’ link in the right sidebar and send them an invite to join the campaign.
After that, take a look at your wiki. There is some more helpful info there.