ошибок действительно очень много.
во - первых, говорится the main colour of the room is beige, а не "there is main colour - sandy".
не "so why", а that's why.
далее множество неизвестных мне выражений.
не стала исправлять, поэтому прошу прощения, что немного переделала.
вообще хотелось бы увидеть картинку, может получилось бы побольше.
если пригодися, буду рада.

As we can see thе room is very comfortable, light and spacious, because the ceiling is very high and a lot of sunlight is getting into the room through the big window, which is decorated with the light curtains. The room is furnished in neutral colours, such as green, beige and white.
At the middle of the room we can see a flowered carpet. A big table is placed on it. A comfortable sofa is placed near to the table. I suppose this is the man's room, because there is nothing superfluous, just important things.
In general I'd like to say that i like the room, because i like that style.