It is better for the bed to face north and south, which is in line with geomagnetic attraction. Sleeping with your head facing south or north will be more conducive to your health. When the human body sleeps in the north-south direction, it can make the magnetic field direction in the north-south direction of the earth consistent with the blood circulation direction, thus making it easier for people to fall asleep.
Yes, but the bed should not face the door. Usually this is the way to address the dead. When you sleep, you should sleep on the other side of the wall. This is called having a backer. Don't put the bed under the beam of the room, it's called being pressed and difficult to turn over. Although these are not necessarily true, who doesn't want to be lucky?