Upon entering the studio, proceed forward through the main entrance. You'll find a letter from Joey Drew on a desk. Read it to understand your purpose for being there. Continue through the door to the right, into the reception area. Head left into the animation department. You'll see several animation desks and a projector. Interact with the projector to turn it on, revealing a short Bendy cartoon. This isn't strictly necessary but adds to the atmosphere.
From the animation department, go through the door labeled 'Storage'. Follow the corridor, and you'll eventually reach a room with a large, imposing machine – the Ink Machine. It's currently inactive. Your next objective is to power it up. Take note of the 'Ink Machine' sign above the entrance to this room, as it's a key landmark. The path to the Ink Machine is relatively linear at this point, designed to guide you through the initial areas of the studio and introduce you to the general layout. check the walls for any hidden messages or drawings.