Additional pics are needed. Take all walls and the dining room area as well.

Not only additional pictures but a floor plan showing all dimensions including windows, doors, entrances to the room, etc. so that we can figure out what we can suggest for a furniture layout.

I’m looking at the reflection on the console against the wallpapered wall and asking myself is there a staircase in that area. Cause I’m thinking about having the dining placed in that space.

Can we see more? This looks like four seoarate rooms to me.

I will add additional pictures but for some context, the wall unit and the window are the same long wall. The black wallpaper is where the dining room would be.

IMO that AC is horrible and ruins the whole look of the space . We need a to scale floor plan please posted here in jpeg format in a comment. I have noidea of youe plan without seeing the layout of the space and some clue as to budget since the look you are planning is not cheap. That buffet piece is not bad but all that stuff on it needs to go Wallpepr used as an accent wall needs to be chosen last to work with what you have so what is it you actaully have already ,

Here is a blog with different design elements for beige and black room. You can copy what you like.

https://fancyhouse-design.com/blog/how-to-design-a-beige-and-black-living-room-the-best-tips-for-a-chic-cozy-look/

If you’re planning on adding shelving or storage space to this space you can add a decorative air vent so air can flow through it.

Yes, thank you. I am planning on ikea hack built in look to hide the unsightly air conditioner. i appreciate your response