Open the door. It is already unlocked. You are learning now to cross the threshold to discover what lies beyond the entrance way.
You need only enter one room at a time, beginning with the foyer. Take your time and look around. Look at the details of the foyer. You may move objects around as you wish. If it is dark, turn on a light so you may see more clearly. This is for you to discover in your own way.
This is an exercise for exploring the depth of your mind and soul. Continue to explore each room and you will find what lies inside. It is not hidden; you just do not see it. Allow yourself to perceive what you know. Give yourself permission to meet your self.