You've made it far, Hawke. 'Demands of the Qun' is the final quest in Act 2 of Dragon Age 2. HThis eight-video series will walk you through the entire quest, with knowledgeable commentary on strategy and tactics that should teach you everything you want to know. You should also check out the written version of the walkthrough here for further tips and support.
From the Creator:
This video begins with the cutscene of Hawke talking to Avaline initiating the quest.
1. After Completing the quest Following the Qun, Go to Hawke's Estate
2. Wrap up any other things you want to do in Act 2 because there will be no turning back after the next step