Summary: The main problem is that the desk is in the wrong direction and needs to be changed.
Solution: In principle, remove the condition that the rear window has no backing. Get rid of the situation that the door is too angry and there is no room for doing things. Get rid of the situation that office workers are too nervous to meet people at home. Get rid of the situation that visitors are too imposing to suppress office staff.
The best solution: rotate the desk 90 degrees to the left (counterclockwise) so that it faces the wall, then put the bookcase behind the desk and the sofa in front of it. The water dispenser is in the north of the sofa. There are green plants by the window on the south side of the sofa. Small fish tanks can be placed on the table, and large ones can be placed on the north side and one side (east wall) of the desk.
The second scheme: If there is no room for the sofa in front of the old office, turn the desk 90 degrees to the left (counterclockwise) so that it faces the wall, then put the bookcase on the right (north of the desk), and put two small single chairs (not the big and tall one) in front of the desk. The sofa doesn't need to be moved, but facing the sofa bookcase, we should put some formal thick books such as enterprise system to suppress the popularity of the sofa and highlight the leading role of office staff. The water dispenser is placed in the south of the sofa, between the sofa and the small chair. Green plants are placed next to the south window. The small fish tank can be placed on the table, the big one on the north side of the desk, and the sofa side (west wall) is close to the door.