You find which colors are in the room (colors that will stay: furniture, frames, tables...) and find a multi piece that you like and match one or some of that colors.

According what I see, blues and oranges (woods).. check other colors in the room. (examples)

- Blue young/cool approach:https://www.amazon.com/Artbrush-Tower-Decorations-Pictures-60x32inches/dp/B07TVZWYWG/
- Blue and gray "nature":https://www.amazon.com/Abstract-Bedroom-Mountain-Pictures-Decorations/dp/B09D9DXHRK

- Abstract blue and gray:https://www.amazon.com/Art-Abstract-Picture-Canvas-Painting-Artwork/dp/B09PYK4X55

-Orange and gray nature:https://www.amazon.com/iKNOW-FOTO-Perspective-Reflection-Decoration/dp/B07KZNKNCR
- Orange nature:https://www.amazon.com/Kreative-Arts-Waterfalls-Landscape-Paintings/dp/B071KKDN2Y

- Bothhttps://www.amazon.com/Kreative-Arts-Painting-Colorful-Maldives/dp/B01M3TRHHE

When there is a big wall to "put something", is hard to do by yourself, because you can create a nice composition of personal pictures in a corner, or small place but when its a large spot it is lot of work.

Canvas are better as you don't have to worry about frames colors. And are light and easy to move and handle.