Cannot see photos very well. Looks like a wood floor, wood table, beige walls, beige drapes,white cabinets, white counter top, black bar stools and black chairs (some fabric and some black wood).. Cannot see chairs well enough to make suggestions. Cannot see blinds nor "slats" well enough to make suggestions. A white ceiling might make it seem higher. Tulip art is colorful and fun, I'd hang it in the entry or living room.

More pictures

I would use a bookcase unit with closed doors on the lower half and not too high. Wide and low maybe. Closed lower cabinets are great for toys, games and will not clutter. Open shelves tend to get cluttered after a while. When displaying books, use in stacks standing and lying down. Open space between groupings, not all lined up in rows. Add some decor items sprinkled among the books to give the eye a visual break. I would choose a horizontal art piece for the chair wall. Add some art on the long TV wall leaving a lot of bare wall between the TV . and the artwork between the corners of the chair wall and the window wall.

couch with a chace