First, don't try making it in survival, unless you have tons of wood. Second, it has 6 compartments, all lighted with sea lantern hanging from the ceiling. You can use it if you have a port in your world, or to put it somewhere in the sea and live in it. Oh, and, try not to burn it. It's entirely made of wood and wool, which burn really fast, so if you do any mistake, and set even block on fire, it's over. All being said, enjoy!