Is it good that the head of the bed and the offering are parallel

Not good! Don't offer this at home, it's not a fairy, it's mostly ghosts. It can be dedicated to Avalokiteshvara.

It's too much space. If the room is big enough, you can put it like this.

Not good, not in line with the habits that Chinese like.

The head of the bed to the north was nice.

Further reading: A benefit of the head of the bed facing north: >>>More

It is generally believed that the bed is best placed in the north-south direction, because the geographical magnetic field is the north-south direction, ensuring that the human body sleeps in the same direction as the magnetic field line, which can make it easier for people to fall asleep. >>>More