This is the current market for you. The price guide for this house was $900k, but it sold for $1M. Yes, it is completely finished, but realistically it is only a one bed house and only 75sqm! Yikes. So though nothing really should be done to it. I may make a few changes.
So following the floor plan above, I would remove the bookshelf below and make this room the living room.
It would look like this
The kitchen is pretty safe/plain, so to jazz it up I would put a black splashback and some black bar stools.
So it would look a little like this.
This area below, which follows after the kitchen would turn to the dining area
And it would look something like this.
Something like this.
Pinned hereAnd the bedroom could do with a bit of life.
So this would be an option.