Generally speaking, desks are arranged according to the divination of the house. The mountain of the house is Sanyuan, and the northwest corner is Siqing Wenchang. You can put a desk facing the window near the northwest corner on the left. Four Wenchang pens can be placed on the desk, which can help students and can also put small green plants.
Just put the bedside near the east and the wall in the middle. If space permits, you can put the bookcase on the west wall opposite the bed.
I hope it helps you.