What you have is a great foundation. Beautiful really. I would suggest not going too matchey on the art. To me art needs to be personal. Look for something you love that doesn't clash. So not knowing your personal taste it would be hard to suggest art. That being said. Think outside the box, architectural elements make beautiful art. Iron pieces, painted ceiling tins etc. I also love taking a terrific personal photo (or 2) and blowing it up, making it black & white and finishing it off with a simple white matt and black frame. What you puts also depends on how formal/casual you want this to feel. You said it is your living room, do you also have a family room, or does this serve dual purpose? I too would love to know what the wall behind the sofa is like and what is on it. I think the armoire could be better suited there. Is there a tv in the armoire? can the room be arranged so that the armoire and fireplace are directly across from each other and the furniture arranged so that they are positioned to view either? I am thinking the sofa in front of the windows and the chair(s) directly across from and facing the sofa? I would love to then see the niche built out with some shelves for a more custom look. The armoire is so tucked in there I feel you loose some of it like the side views. It is fine where it is really, just another thought.

that is a lot, lot of wood! It's nice, but it's just a lot. would you consider painting the window/door trim and the baseboards in white? it really would look so nice, especially w/the pine ceiling and the oak floor. here is a before/after here's a wood ceiling and floor w/white window trim so you can see another pic w/your pine ceiling next to white trim (ignore the coffered ceiling beams) If you'd like to put in a few beams, do them white: (notice white trim again!) I'd have the floors stained in a walnut shade. Oak is beautiful in that coloring and if it's red oak, it will hide the natural pink tone. this tone. If you need to put in shelving, consider something like this w/a black background. notice the white trim/baseboards. actually, if you will be doing flooring, consider removing the existing smaller wood baseboards and replacing them w/the taller white ones, like in this pic above and the one showing the wood floor, above. As for ceiling fan, since you don't need the light, pick something in a sleeker type of fan blade, less bulky than what you have.for the storage issue, I don't know what the budget is, or do you have DIY skills? plenty of built-in type of cabinets you could do. Even doing an Ikea hack w/the Billy Book cases would be an option. pine ceiling and walnut stained oak floors, white trim and baseboards. gives you an idea for your space. nice fan too or, if you had thoughts on painting the ceiling

i like the thought of white or beige in your windows. let me give some samples i have. let me know i will look them up for you.love the bottomsimplethe tops give a certain amount of elegance.

The fixture above in my post is what I would like to install. The below link is similar to my dining room chandelier now, except mine is bronze with cream glass. I couldn't get the picture to upload. https://www.lowes.com/pd/Progress-Lighting-Renovations-27-25-in-6-Light-Forged-bronze-Etched-Glass-Tiered-Chandelier/50131632 I cannot post a picture of my space, hence the drawing, as it is presently under construction with materials and debris everywhere. I hope this helps.