You were right, Cassie, here I am.
After you have spoken to Fela's dad, the cut scene takes you outside the Council building. Go back in. In one of the rooms you will find the Archivist. He gives you the quest.
Leave the Shrine until as late as possible when you have completed all the quests because your rewards will be based on how you completed several of them.
EDIT
Just saw that bit about modes. As far as I can see from queries from people who have done the game on easy, all quests are available to everyone.