Im expecting a 12 - 18 mnth fed term

how much tim should I expect to spend in prison and how much time should I excpect in a halfway house.

Then do I get home confinement or what comes after the halfway house

Well to put it in the middle. If you get a 15 month sentence you would get 39 days halfway house. You don't have to go to a halfway house, you can do all of your time in Prison if you want too.