Hello, Here are some general color tips for you to help narrow the type of feel you want to go with. If you want to go with pale shades of a color it will make the space seem larger and airier, while intense or dark shades make spaces seem smaller and more closed in. Shades of red and yellow stimulate feelings of energy and excitement but also sometimes of anger, agitation or irritability. Hopes this helps! -K&N Sales

Basics first, please get rid of any plastic furniture like that chair. secondly all table tops need to be cleared of little mirrors, table clocks etc. just place three most loved items of your choice ! Arrangement can also be improved the table could come on the side and bed could be centred a bit better (along the window behind it). Walls can be painted a neutral shade like light beige with a rug of your choice on the floor (contrasting- like red so that the pink curtains could go with it)If you could change the curtains then the best option would be to pick a solid colour of your choice and a matching rug (blue, red etc whichever is your fav colour but please avoid printed cutrains)

Yes, moving the bed under the picture wall would be good, and provide space for a chair and ottoman as you mentioned. And i have actually put a new set to curtains today which is a slight brown colored one. And I was thinking about painting the walls with the picture and the one with cupboards in a dark red shade and the adjacent walls something between off white to cream color. I plan to change the floor tiling too, but not at the moment. I've been thinking of making it a wooden flooring. But not sure what color to use.

Send the layout for the reference and easy guidance along with your location.