A Chinese-style desk is placed at the foot of the bed, leaning against the western wall, and people are ready to lean against the eastern wall. This is a good place to see from the chaotic head. Don't look empty at your desk, or you will be unwilling to work and study. So don't stand by the window, there should be a mountain on your back, so that you can have a foundation and help your career and study.
The desk should be placed in the northeast corner, but don't sit with your back to the door. There may not be enough space in this position. If it can't fit here, you'd better put four green plants here to promote wenchang star, or put four Wenchang pens.
I hope it helps you.