If you want to study near Wangfujing or Xidan, it is recommended to live along the subway. It is suggested to live near the ancient city of Shijingshan and find a nearby Shougang community to share. 800 yuan to 1000 yuan in January is enough for you to cook.
If there is no sharing or trouble, find yourself a small hotel first, and find one nearby. January 1500 is not bad.