All the items you need to move the game along is in the bedroom, so don't worry about going to the other rooms of the house.
2 items are on the shelf, 2 items are on the computer desk, and the rest are found on the first scene with your bed. You want to find the camera, the battery, the big yellow bag, the laptop, the pen and your cell phone. Afterwards, a scene will play where Julian gets dressed and goes to work.