I have finally improved and decorated the office, the truth was not very difficult. And if you wonder where I get the IBM MS-DOS computer? It was a blender model until I had to convert it to FBX to use it in Cinema 4D and it worked. I put old monitors as it should be in the 90s, since for some reason LCD monitors didn't exist in that year. But well, here I leave the image of the updated office.

Sincerely, @NewAngelGamer22GamesDeveloper.