In addition to all the advice regarding the accessory I would work on making the light more yellow rather than blue as it's the case right now? it seems that there is no much natural light from the picture and it will make a huge difference to change and adapt the lighting.

I agree with Red80 re furniture layout. There are lots of good things in this room, I just personally find the cushions and blinds clash with the chandelier and wallpaper. I would swap the 2 geometric cushions for softer patterns in lighter grey/white/duck egg. I'd get something with different textures as the cushions fabrics look the same atm? Add accessories to your coffee table, maybe just a pile of books, a vase of flowers, and an "ornament" in wood/ceramic/pewter etc again for texture. When budget allows swap the blinds for Roman blinds. Try blinds 2 go or Tuiss which is their sister company if you're in the UK. I can't remember the exact price but I got pure silk Roman blinds for 2 really large windows for c£450 which sounds a bargain to me although not yet up:) I agree the mirror is a little high. If you can, without leaving a hole on show in the wallpaper, I'd lower it as long as it doesn't reflect the tv! I'm not sure the pics to the left of the window work as they're obscured by the curtains. Perhaps also a taller vase/pot in the blue for the tv cabinet to detract from the tv a little more? Alternatively you could change the wallpaper and the mirror to give the room a contemporary rather than classical feel

Hi. Its a lovely room, I preferred the table straight on where the sofa arms also didn't overlap tbh. I can't photoshop at all but it may give a very rough idea! If you want to paint then I'd go for aubergine on the dining wall and a lighter shade of the curtain colour on the rest and use green as your accent colour.. I'd put a round table between the sofa corners, I think something in white and oak would marry your dining table and tv unit but struggling to find something that's not obviously scandi in style! I'd pop a fat round lamp on there with a patterned shade with green in or a textured shade. It's hard to find something that will either fit in that empty corner or work on the long wall but this bookcase/display may work? I'd also add art behind the dining table

I think you could put the tv in the opposite corner on the other side of the window, then put the two chairs (if they'll fit) side by side on that wall (with the door) with the table in between. If these are a bit too snug, you could always angle them into the centre of the room. Then the sofa could go opposite the window at right angles to the door, but a little over towards the fireplace wall. This will give you clearly defined "square" sitting room area, which you can further delineate with a rug in your chosen accent colour and then add coordinating or matching cushions and throws. I would then move what I think is a glass cabinet (in the corner of the dining part of the room) to the left hand side of the radiator cabinet. I would then try to move the dining table more towards the kitchen and the now empty corner. For the dining table I would look at getting something like a table runner or a big bowl/vase/ornament with reflects your chosen accent colour which will visually join up the two areas. I would also be tempted to replace one of the pictures with a large mirror. And also perhaps think about getting different wall art.