A floor plan would definitely help @Candy500, but I agree that the sofa facing the fireplace if possible would look good! I'd want to investigate the fireplace itself to see if there's original tiling etc in there somewhere.
@Lifebeganat50 is right about the pictures being too low/small - although I appreciate you've only just moved in and they might not be permanently placed! Art needs to be at eye level and if grouping several smaller pictures, the bottom one(s) can be even lower imo.
I don't agree with @abracadabra1980 re: rugs - no-one said they need to be 'half poking out from under the sofa' which would be odd - they should, theoretically, be sufficiently large for the sofa(s) front legs to sit on it, with the majority of the rug in front of the furniture. Depending on the room size - again, your floor plan would be invaluable here @Candy500 - you might want, for example a 3m x 2m or larger rug.....
A larger sofa, more art, lamps, plants and patterns/textures in colours you love, to complement or contrast (depending on your level of bravery!) with your walls/joinery colour - which, btw, I'd colour drench in something a bit more punchy than Timeless (but I prefer deep, saturated colours which you might hate!). No feature walls, although wallpaper all over would be lovely.
It's potentially a lovely room that just needs your personality stamped on it. If you choose what you love, gradually rather than expecting to buy it all en masse, it should all come together beautifully 😉