Hi Maria, we love the wood but it is a little overwhelming in that space with the timber floor. A liming white is a great idea as mentioned by a few people here. This will let you have the best of both worlds, a lighter, brighter finish while still allowing the wood grain to show through. You could try Feast Watson Liming White Floor Finish (yes, it's not a floor but it has the size of a floor!) and build up the number of coats until you are happy with the amount of timber grain showing through. You'll probably need to give it a light sand first as it's most likely already got some type of coating on it. The other option would be to leave the walls as is and consider a large, light neutral coloured rug as pompom suggested on the timber floor and perhaps a good sized piece of art on the wall or white wall shelving instead of the dark side unit you have to reduce the amount of timber in the room.

I would use taubmans undercoat it can be used under enamel paint as well as acrylic, and coverage is good. You might need to sand the walls lightly to give an even finish before applying any paint.

Colorbond visualiser. http://colorbond.autech.com.au/onlinevisualiser/index.php?frame=residential

Pearl ash quarter looks soft and pretty online. I've gone with dulux white duck in our house. Full strength in the brighter spaces and quarter strength in dinner hallway. It has a slight green tone which suits the garden outlook.