Do you want more colors in the room or do you want to keep with a blue & white? Appropriate art is relative and difficult to suggest for another. However, these prints have the wood tones of your room. This Ocean Ikat I II III IV series I first saw the above prints at an Ethan Allen store selling for $500 each. Save money and buy prints and frame yourself. The same artist has black & white Ikat series at EA here: Something bright?

I would not add blue to this room. The orange looks great, and suits the woodwork very well. The wall looks, to me, like it has some olive green tones in it. Green is the complementary color to orange, so that's why the walls and sofa look good, and go well with the rug which has both those colors. Blue would be jarring. The rug is a bit too small since the furniture does not touch it. I would face the sofa towards the fireplace with the rug in front of the sofa, with the sofa feet touching the rug. The gold chairs could go on either side of the sofa in a C shape, or remain side by side in an L shape conversation area. I'd put the orange pillows back on the sofa, and get new pillows for the gold chairs, in a solid green color taken from the rug. Consider a similar color for the drapes. I wouldn't put art over the fireplace, and definitely not a mirror since it wouldn't reflect anything interesting. Stick with sculptural items, maybe a bit bigger than the items you have now. Hang a piece of art work over each of those lovely bookshelves, a little lower than you currently have the one painting. Or even prop it on top. But don't put other things (vase, clock) on top of them. Too fussy and distracts from the woodwork. 2 desks is one too many in the room. Keep a desk on the wall where the guitar is, and leave the other wall free of furniture, as a walkway. Your white front door is a bit too bright, and doesn't look good with your woodwork. Paint it a green color, not too pale, that looks good with your pillows, rug and wall.

I see starfish in the windows, a sailboat on the hutch, and a picture of a lighthouse on the floor. It would be so nice to have a home that has the ambience of a coastal retreat. The long white TV cabinet in your idea book would be perfect, and would go nicely with your white chair with the curly arms.

Most finish on site hardwood can be done to match your other floor and IMO the best choice put mats outside the door and inside do you have a coat closet there and a boot rack ? If not maybe add both to the garge side so shoes would be off before entry and I just wipe my dogs feet before we get inside he almost picks his feet up before I even start. IMO if you don’t want that then go with a vinyl that looks like stone instead I would also suggest you post a couple of pics of the space