My flat

There are two bedrooms - kitchen-studio, and one bathroom in the flat.
There are four walls and one window in my room. There is a bead, commode for linens, and a cot. The bed is in the middle mild of the room , the cot is near the bed , and the commode is near the wall opposite the bead. The computer is on the commode. We watch cartoons every evening. Two blinds and one curtain are оn the window. The lamp* is on the ceiling.
There are kitchen** furniture and the dishes in the kitchen. There is not balcony in the kitchen and or in the other rooms.
One room we are using how now as a nursery. There is one coauch, one wardrobe, one desk , and a computer. There is a television on the wall and PlayStation on the shelf in the nursery.

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* Lamp - usually lamps are lights that you put on a table.  We usually do not call lights on the ceiling "lamps".  Instead we call them lighting fixtures, chandeliers (if that's what they are), etc...

**Kitchen - it seems unnecessary to say kitchen furniture and then "in the kitchen" in the same sentence.  It is not wrong to do so, but it will sound better if you remove "kitchen" when describing "kitchen furniture", since you tell the reader that the furniture is in the kitchen already in the same sentence.

Lots of minor corrections but overall good job!