can you suggest how can designs my rooms

First thing you need is a pad of graph paper to understand that there is no way the furniture items are to scale (exception could be the dining table) I'm guessing the kitchen is off to the left and the main entry is into the Drawing room? Can the wall be eliminated between the two spaces for more flexibility? - if so, the drawing room space would lend itself perfectly to a round dining table. But the main thing is to draw on graph paper the space & actual dimensions of the furniture you'll be bringing to your new home - so you are not shocked when you move in.

Let your wooden beam be as it is. put your Led lights in the other direction ( two on each side in one rectangle , so the total will be 16 units of say 10 watt each Led.), as to balance the horizontal and vertical shape. Don't put anything on the wooden beam to retain its the beauty.

Hello Anindita, According to us, placement of sofa with lounger is obstructing the actual space of this living room. Apart from this, you can add few home decor items like pots & planter, artificial flowers, indoor small fountain, candle holder, etc. on the top of storage which is besides door and on TV unit shelves. Also, you can add flower vases in the corner of sofa or side of TV unit. Introduce caramel coloured rug below center table. Moreover, you can include metal/wood mural or abstract wall panelling on the dead wall. Regards, HOME CREDENCE