Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
This game will use a draft system to assign roles. The draft order will be decided with MafiaWiki's Lowest Unique Number system. The link explains how draft order is decided. PM me your two numbers for this draft order when you sign up.