Rowe Furniture has very clean line sofas that I think would be an appropriate scale for this room. LOVE the red feature wall. You do need to bring the red into the room but knowing how you want the room to feel can help determine a color palette. If you want the room to have energy and "pop", try a split-complementary or triadic color scheme. If you want it to be more relaxed and harmonious, I would suggest an analogous color scheme.

Not sure if you need curtains when you have wallpaper? It's already a fairly busy room and it may make it feel smaller and heavier, but if you want curtains I would duplicate the same color as your bedspread.

It will be my opinion don't put curtains for small doors usually windows only we can use curtains for balcony also if more than 5 feet you can try inbetween colum and in center you can try like this type of sliding doors

Hi Aditi, As Gauri mentioned below, you can play with the space and be creative here. As trusted interior designers in Chennai, we suggest considering plant vines or a few strands of curtain creepers to bring a touch of greenery and life. Even if your lifestyle doesn't allow room for real ones, in this day, you can also incorporate artificial plants in the design as long as they have a very life-like look.