There are tons of papers available that would go with your midcentury home. Many people tire of a paper quicker than they are ready to redecorate and they can also look dated in a couple of years. Metallic papers were big im midcentury...perhaps a metallic silver paper? Are you also considering paint? You can get it in so many textures and a blue wall to match the blue in your loveseat would be lovely with some midcentury art and sculpture, or photographs on it. A mirrored wall with or without art or sculpture would also work with midcentury. These treatments are easier to adapt should you wish to change the look slightly from time to time. I would suggest replacing your stairrail with chrome or acrylic if that is in the budget...see how well the loveseat frame looks with the fabric? I hope you will post the "after" photos for us to see. Above all, enjoy the process!

The wall opposite the couch could hold the TV - would need to mount it on the wall and that would take a while as we would need to get someone in to do it (I love my husband but he's not the handiest). Where the photo was taken is a three seat couch, so couches are in an L shape.

go to www.etsy.com and check out HAND made items by artists and crafts people. You never know what you will find and it is very, very fun to look and learn about the incredible things people fabricate. One nice item that comes to mind that I have seen on Etsy are "Beach blankets". I did not know about them because, I've never lived by water or the beach but, apparently if you live by water you always want a big, light weight fabric to use to sit on or to stretch on poles to shield you from too, much sun. I f there was a big "beach blanker" that you liked enough, it could be in your room as an extra blanket, throw or as a window covering perhaps. This would be a good way to remind yourself about your love of the water and surfing and the beach. https://www.etsy.com/shop/AMIZANTI?section_id=6832219&ref=shopsection_leftnav_3. Maybe this is kind of an exotic option for you at your age but, I think its never too, soon to attune ourselves to culture and the arts and interesting ideas from across the world. Also, on Etsy (not bedding) are wall murals. My client's son Max wanted to feel part of the woods so, I found and he and his dad installed an incredible mural. So, that might be fun for you to explore too. I am showing the one they picked here. We did not stick to any kind of bedding collection. Instead we bought a big combination of Max's favorite "Forest Colors". See bed picture for example. Think outside the box, have fun!

OK - I'm a beginner here on Houzz so my opinion isn't worth a lot but here it is: the room is a bit bland and lacking in character. I think you have to find some pieces you really love to bring it alive. All the suggestions are good for widening your horizons, but ultimately, you need to find things that matter to you, because it's your home and not a magazine photoshoot. That said, if it were me, I'd throw a couple of small, colorful rugs down, and put either one large painting or three smaller ones over the bed - not in a line but at different heights - to break up the binary look. I'd also put something on the wall above the heater. Then, play around with a few cushions and maybe a quilt that picks up some of the colours in your artwork.