Make a few changes to the home page and give people an idea of what your campaign is about. That will let people know you’re serious and not just playing with the system.
The adventure log is where you list the sessions and adventures your party has been on, but for now, we suggest doing a very light “story so far” post. Just give a brief overview of what the party has done up to this point. After each future session, create a new post detailing that night’s adventures.