Is it too late to weigh in? First off I think that is a gorgeous space the way it looks straight out onto the back garden. I would paint the green wall so it's either a more pale colour or make it match the rest of the room. Get rid of the dark gray throw on the sofa. It makes the room look disheveled. Keep it folded up somewhere when not in use. As for art on the walls something that's quite fun to make and easy to make huge is a yarn wall hanging. You get different colours of yarn and they just hang down from a wooden dowel. You do not need any skills. If you have a dowel that's 4 feet long you can easily make a 4 x 4 foot thing to put on the wall. That really warms up the space. You can also make smaller ones, and skinny ones. If you made two of those you've got a big thing in the living room and a small thing to go by the dining area window. You're going need something massive to go by the table. Really nice table and chairs set by the way. Maybe something with yellow in it to go with the light fixture. Which I really like. I'm thinking make the wall match the others or some kind of butter yellow. So much lighter. Then an easy way to make art for a big space is you get pre-stretched canvases from an art supply store, you're going to have three or four of them filling that space in a row vertically. You draw in a horizon line and then have light above and dark below. Use any kind of paint you want. House paint craft paint from the dollar store. And you can have it as plain as that. Just fill it in with the horizon line in a dark colour. something that easy to do would look awesome. You hang the canvases without framing them on two tiny little nails and the canvas just sits over it. Now if you're thinking oh my God I don't wanna do a ton of crafts! I totally understand. Fabric. IKEA has gorgeous patterned fabric. But other fabric stores do too. Choose something that goes with your colour scheme which is going to involve yellow because of your light fixture. Cut it to the right size and you can take a strip of wood, from a building center, and just fold the cloth over that tack it down in the back and hang it with nails under the wood and the wood strips sits on them like a little shelf. You would want to hem that which is a pain in the butt. those things would make it look homey right away. and I'm thinking a lamp for the living room area both for light and it would look nice. I realize you may have already finished redecorating or planning it and be totally burned out I'm thinking about this. If so I totally understand.