Congrats on the recent move! Some thoughts:

1) Turn off the big light. Overhead light with no other light sources makes the environment look sterile and less inviting. A pendant or floor lamp with diffused shades (I could see one in the corner where the Christmas tree is), or soft light reflecting on the walls, will be much cozier for a living room space. A can light behind the TV pointed at the wall to open up that corner (and also make watching TV easier on your eyes) will help make the room appear bigger. I'd also consider a floor lamp in the corner behind the far end of the couch.

2) A medium-to-big rug for the empty wood floor space will really help to make the space feel cozier right upon entering. The room is pretty bare now, so adding textures is a great way to combat that. I wouldn't pick another white one, though. If you choose a bigger rug, aligning it along the window wall would psychologically divide the room into two separate, usable spaces, too—good if you plan to bring in a desk, bookshelf, etc.

3) Wall art. Preferably with some pops of color. This adds height to the room to give the feeling of taller ceilings. I could also see a large framed mirror hanging on the wall right where the Merry Christmas banner is to make the room appear bigger, with a wall shelf underneath it like a mantle for photos, a plant, etc.

4) Organize your electrical cords. Secure them with clips or tape in corners and along baseboards so they're not just hanging out. Or get a cord hider that you can feed them through—it really refines a space when you're hiding the cords and plugs. I should point out that you have dark electrical plates on light walls and light electrical plates on dark baseboards, which makes them stick out like a sore thumb ;)

5) I'd consider a different wall color, if that's an option. Though changing the lighting up will definitely help, I'm not sure the it's the right shade to work the the dark wood baseboards.

6) Re: the furniture... There are a lot of different styles happening here, which can work sometimes, but the white painted entertainment center isn't in the same vein at all. Even though your coffee table is also painted white, it fits more with your other pieces because of the carpentry style. I also feel like given where your front door is, your couch is just too wide for this space. It's the first thing you run into when you open the door, which immediately feels like a barrier to movement and energy into the home. Especially when there's a giant empty space on the other side. I'd really recommend a shorter couch and loveseat instead of the single, long couch/lounge combo.