Hi sagar goyal, can yyou tell us that for which purpse you are using this room it looks like a drawing or sitting room from your design. Dear here i am attaching some pictures which you can see and have an idea that gracefully you have quite large space and you can make a great drawing or sitting room by just putting colors,paintings,and other things on it.First make your room white because white has a best quality that every color will match and looking so cool on them.Put colorful sofa covers and curtains in your room.With colorful racks as shown in a picture,you can also add greenry according to given picture a wall hanging which you can put on one side of your back side wall and if you want some space to put your things in it so you can use cabinet which i given to you in my first attacment of pics.both wodden work on back side and both color full wall hangings for decoration keep it on your both side walls it gives you matching and very balanced interior also you can put wooden floor to make it more appropriate.or else you can use my two last pictures as keep your interior more balanced. I hope you can get more and more ideas and you will have a great room .Good luck .

Or make it a feature? Add a built in bed/sofa with storage underneath. You put some cushions there and kids playing can sit in the shade if they wish. As it is open on two sides you will have a breeze and can even hung muslin panel to avoid mosquitoes for a quiet afternoon nap

How do i decorate the walls of my room? If i get a painting what sort do i get and how big? Should i get one large piece or many small ones

Hi umesh - Here are a few photo wall ideas that can inspire you: https://www.houzz.in/magazine/design-a-family-photo-wall-stsetivw-vs~77445238