Title says it all, I have first started a nuclear reactor that will supply the entire shit with power. I am starting to make rooms and such but I need more ideas and I don't really have a basis off of anything, and I fear I would just make identical rooms all over the place and it not really look like a shit. If any of you have seen starwars I want to make a cruiser like the white ones with the multiple engines:
Try making a box of diamond with floor filled noble gas inside. It acts as a pressure balance that will keep the ship pressurized if it suddenly breaks open and then is sealed again.