You do not mention whether you wooden wall will be painted or stained wood. Either way, there paint products you can use to properly seal and protect the wood either way. You should visit your local paint store and tell them what you are trying to do and see what products they recommend.

I think you can start by de cluttering. There's too much going on. If you want to keep the bedspread, I would pull some colors from that. :) Teals, browns, whites. It would make a pretty room.

Well I'll try to make a 3d of the room and upload it. But that will take some time. Thank you :)

I'd suggest dark red curtains if you need curtains at all -- the windows are beautiful as they are, and I'm not sure whether some kind of blind might not give you the ability to darken the room when you want to. On the wall, if you are real fans of any movies or TV shows, three big posters would be fun. Otherwise, I would still suggest using three pieces of art there of that size, all equal in size and somehow relating to each other. Three floral works, or three works in the same style, perhaps. I think a large plain textured rug in a light neutral from one of the cushion fabrics would tie the space together well. You might also consider a lovely low coffee table on the rug to lay out your snacks and drinks for serious media nights.