Turn back from the place you are standing, you can find a blue couch to your left and a stone wall to your right, go near the portrait which is infront of you, where there is a small plant and some books placed on the table, turn to your left, you can find two closed doors, go near the first closed door, turn to your right, you can find an opened door to your right, go and stand infront of the opened door, that would be your end point.