Your bedspread picks up the blue in the abstracr, but you need more punch. Shams in a dark blue, and blackout drapes in dark blue, lose the brown curtains.
Add the art over the bed but do not hang too high. You can find height recommendations on the Houzz website.
The other small shelves on the adjacent wall are too high and too small to make a statement so I would not keep them - at least in that spot.
Lamps on the side tables. Happy to see you provided 2 tables and did not jam bed against the wall.

Is this your space or a guest room, either way you need a headboard, some lamps , get rid of the tiny shelves and add full length drapes in a blue from the bedding.

Is this a guest room? I like the art work inspiration. Keeping it light and simple is a nice idea but you need to ground the space here and there with different tones to help the eye move around a bit. What's your budget for changes? I will say I don't love the brown curtains. Something lighter and closer to the wall color will keep it airier and brighter. The tables are smaller so I would consider wall sconces to hang on the wall and keep the top of the nightstands free. I wold also look for a wood headboard close to the color of your wood blinds to carry some of the wood around the room.