Handling the compass should be very careful. How to handle the compass, I have given a reply for the similar type of question.
Any compass you buy, the red colour needle will be NORTH and south will be black.
As such you just place the compass in the center of your house and slowly rotate the needle part comes to the NORTH. As it is no compass will not show the North. manually we have to rotate to get the North then other directions you will know.