Not every tomb has a ghost, they are a little more dangerous. Mostly its one on one vs skeletons who are lined up in a hallway unable to get at you effectively. If the tomb you found is hard to handle, look for another: there are many and most sound easier than what you found. you can run past the guards inside if 3-4 guards are trouble for you. They WILL be there when you leave, though! It is not uncommon to have to make a kiln, use it then break it, reuse the cores for the smelter until you get a bronze shield and weapon.
See what else you can make from the things you find outside too .. new food? New wood? Poke around a bit!