Install a ceiling fan
OK, the white wire is your neutral, not ground. If you only have a white and a black out of the ceiling box, then I'm guessing the box is metal and probably grounded. Check the box to make sure it's rated for a ceiling fan. It usually says so inside. Install the fan bracket and then the fan. Hook the black hot to the black from the the fan. Hook the white neutral from the box to the white from the fan. Hook the bare copper or green wire from the fan to the box or green screw on the bracket.