In my opinion, a cuckoo clock is a very detailed design, but you say you want a simple design for the room. When you say simple, are you thinking of no wallpaper, no wainscoting, and no accent color on the walls? It seems as if dark orange is a color you favor. I see it in art images and in your curtain color. If this was my space, I would paint all the walls one or two shades lighter than the beige of the sofa to keep the room as bright as possible because the room has no direct sunlight. I would paint the ceiling 1/4 (one part wall color to three parts white). I would use a satin or eggshell paint instead of matte, semi-gloss, or high-gloss paint. I see some discoloration on the wall behind the sofa where the brown color of the sofa frame has worn off onto the wall. I suggest attaching bumper dots or strips on the wood frame of the sofa (similar to the ones used to keep cabinet doors from making a lot noise when they are closed quickly). I would consider painting the sides of the column with the cuckoo clock brown to match the clock. I would do this to call attention to the clock. I would remove the orange curtains and replace them with floor-to-ceiling length draperies hung as close to the ceiling as possible to make the room seem larger and taller. I would change the drapery color to match the walls, perhaps in a muslin-like fabric, which is a casual fabric. I always take my art to a professional framer. I have conservation matting and museum glass used for my art. I would have the three images you have rearranged as a collage in a very large single frame with medium to wide matting between the images. I would have the mat and frame color(s) enhance the images, even if it is a color I might never have thought of on my own. I would hang it above the sofa. I would use the orange drapery fabric to make throw pillows for the sofas. You did not attach a photo of the flooring in the room. A medium tone floor is easier to keep looking clean than a light floor/rug or a very dark floor/rug. Other "Houzzers" will give you completely different ideas. Use the ideas YOU like and enjoy your home!

We need a bit more info are the wall colors staying, all the art on the T.V wall needs to be gone the 2 floor lamps really do not work together I have no idea what that turquoise thing is on the right maybe a curtain , with waht you show IMO you could go any direction for fabric for the chairs I think they might be fun in zebra print the black and cream one with black foot stools

that is what i have added if you can see the pic above.. want some suggestions on partition that i can use between dining and sitting

I wish you all the best for your renovation. One of the most positive thing about the house is space looks convenient. To start of with the designing, 1. first let us start with a creating a focal point, now that the sofa Color is Blue, let us try creating a palette (photo attached) starting with blue, so we can paint white Color on the walls. 2. let us put on two mirrors on both sides of adjacent walls of the curtain which makes it look spacious and reflects light. It gives a cool effect. Even when the curtains are covered. 3. U many use a rug to match the Color of sofa and white walls. Make sure the rug is either beige or a combination of blue, white and grey hues. So that it complements everything well. 4. U may paint the wall behind the TV grey or give it a wooden panelling effect with wallpaper or tiles. That makes a focal point. 5. Increase the height of TV stand with Aluminium or Stainless steel rods, u will find them in the market and paint it white. (Photo attached)