What are the odds that a person who likes the same stye you do just happens to see your request, and then comes up with just the right items and where to find them? Sorry, odds are slim. What I can do is give my opinion on the direction I would take.

I would add color. Doesn't matter which color as long as you and anyone you live with likes it. Black is a color, so you could do just white with black. This Room is white and black with a deep blue-green accent color in the drapes, pillows, vase, and—though you can only see the edge—photo art of a stormy sea that reflects the chosen color. Or, you can add Metalic Accents for drama. Obviously, one doesn't have to fill every surface with the accent, (LOL, I would have gone with just the giant clam shell on the coffee table and only one piece of wall art.) as it's better to add color or shine sparingly. What you want to do is spread the color across the room. You can do this with canvas or metal art, vases and containers, with fabric such as curtains, pillows and throws, and additional furniture like a coffee table or an accent chair. Just make sure your eye can follow the accent around the room. Now, I tend to view wood as a neutral, so IMO you don't have to match new furniture to your floor or other furniture already in the room.

Where do you find these goods? Stores like World Market, Urban Outfitters, Home Goods and such. Do a search for online businesses selling art, home decor and more. Whenever you are shopping try to take a look at any home decor. Don't be in a hurry to fill up your room. Think about what direction you want to go—refined and elegant, contemporary, urbane, cozy and livable. What criteria make an item fit your scheme? Make sure the item fits your style and your space. Here are some Design Guidelines for decor.

When you go shopping, take photos of interesting items to look at again when you are home. Some buys will be mistakes, so don't rip off the labels and price tags before you are sure the item works in your space. When buying furniture, be sure to measure your available space before you shop and take a tape measure with you to be sure furniture will fit before you buy it. Remember that the light in stores is most often bluish, while home lighting usually has a yellow or orange tint. This can make colors appear slightly different. Good luck.

First order of business is to discover your style. In top search box, put (one at a time) different styles. Examples are: casual, contemporary, transitional. Note what you do and don't like.

Agree, find your style (and if you like colors or layered neutrals). Then blend with function: you will need somewhere to put down drinks for all persons who sit on sofa (coffee table, side table, drink table?). You will need layered lighting (floor lamp on far side by window perhaps). I think your wall is calling for a large piece of art, Art is personal and something large can be quite expensive (or get a large canvas and DIY). To me, your sofa style doesn't lean towards a gallery wall on that wall, but that is also a possibility.

Based on your sectional and pillows, a few inspo pics on a possible direction, leaning toward modern boho perhaps

Old World Modern · More Info

My Houzz: Chic Boho Style for a Hawaii Apartment · More Info

Boho Bungalow · More Info

Just sharing a couple rugs that would go in that modern boho direction

It’s hard to say without knowing budget, what styles you like, other decor in apartment ... so I’ll just post what I’d personally do in this wonderfully neutral blank slate to jazz it up. I’d go in a mix of traditional/vintage contemporary/sophisticated direction.

Floor art — bold and colorful rug:

https://incrediblerugsanddecor.com/products/surya-aurora-aur-1002-black-area-rug

Rug

With either of those, an elegant glass coffee table:

Glass table

For curtains, I’d do darker solid panels, or with a subtle pattern, choosing a color from whatever rug you get:

Khaki and gray

For art — that’s something very personal. Find things you love, that speaks to you, rather than trying to match it to anything.

Pillows can go in any direction. Etsy has great selections for unique ones. I like what you have and would just add a couple of colorful ones, or animal print (which I always add somewhere in my rooms).

I’d get a floor lamp for the window side, something in a simple style:

Overstock

This is from Lamps Plus:

Another idea is a mirror over the sofa ... the light reflection would be so pretty in there. You could add art you love around it.

Mirror

The other rug:

Lamp .... Pillow .... Curtains

Wow! I came back to look at that first rug (for me, in a smaller accent size) and they’re sold out on every rug site. Just since I posted it! I made sure it was in stock before I linked.

Well, anyway, I don’t know if you even like it, but if you do, there are lots of similar ones.

Quick mock up to help get you started with some inspo

Maybe one of these original artworks would add some texture and contrast to your wall. Here are some ideas to ponder. Good luck and enjoy decor !

http://www.pooviartgallery.com

Abstract landscape tree painting · More Info

Flow Acrylic Interior design Artworks · More Info

Flow Acrylic Interior design Artworks · More Info

We offer a wide range of award winning wall art and photography available in multiple formats that you may like at http://mndphoto.com

Did you make any decisions/updates? Would love to see pictures of the updates.