Where did you find this image?

It all depends on how much money you would like to spend. As your lounge is dark and your stools and bookcase are also dark I think white chairs would be fine, but then I would change the stools as well and take some white down to the lounge area. However you can buy stretchy covers for this style of chair for around $10 and there is quite a variety, so I would look on line for those to see if you like any of them as that would be a very easy fix.

From what you have said, I think smaller separate pieces such as couch and chair(s) rather than a large sectional is likely to work better in the space and still allow for traffic flow. However, if you still have lots to do then don't rush to make large purchases. In the meantime, if your current sectional looks better pulled away from the wall a bit, then perhaps you could rotate the side table so that the long side runs parallel with the sofa arm instead of the wall. Would that help to stop it blocking the doorway and resolve the 'not quite right' placement?

Thanks Jane. the render walls are natural yellowy colour. im trying to match with maybe stowe white or antquite white dulux paint stowe is a little dark.