Other good option to start the Demons task I'd recommend you to go to Demons at the restricted area at Yalahar (Magician Quarter), there you will need to spend a Soil (energy, earth...) to access the area. You have two respawns, each one with at least 5 demons and a good space to run without lure more than one Demon per time. You might start hunting at the left respawn. Also you should search videos at YouTube, there are lots of them explaining how to hunt at this place.