Mythos/Greenreach Priory

Know that Greenreach Priory is the tutorial area of the game, and currently it is forced upon the player (you must complete the quest to be able to reach Stonehill). The other catch is that once you leave, you cannot return - party members are also unable to join you in the instance of this zone.

After the loading screen clicks off, you'll be thrown straight into the game. To your right will be standing a priest NPC who has a large yellow exclamation mark above his head. This tells you that he has a quest available for you. Speak to him, read (or skip) the dialogue, then accept the quest.

Head into the monastery and defeat the boss (it's easiest just to kill everything). If you do clear out the area, you'll be both richer and closer to a level up. When finished, head back outside (or use a recall charm) and talk to the priest NPC again to get your reward. Additionally the path to Stonehill will open up, so head forth to the next town.