Your photos give no clue as to how you would move through the house, and there are not enough of them. You need a photo of the foyer/hall looking through to the kitchen, photo from dining room showing kitchen door and another from the angle of the current kitchen photo, at least two photos of the living room, one with current view and one from the desk (?) corner. The photo of the view should be last. You need a photo of the back of the house from the garden.
The photo angles are wrong - too much ceiling in all photos.
You need light fixtures, splashes of colour everywhere, a bigger dining room table or a big, colourful area rug in the dining room, plants - oversize ones in attractive pots or preferably pots in big baskets in the sitting room, plant on kitchen window sill. Decide on an accent colour and place a few items in this colour around the house. The pink guitar might be a good starting point.
Take down the little photos from around the map on the dining room wall. Take down the orange framed art and the wicker thing from the window wall in the dining room. Take down the family photos in the kitchen. Take the stickers off the french doors in 2nd bedroom. Remove items from on top of the kitchen cupboards. Take artwork from the outer space-duvet bedroom wall. Tidy up items visible in storage unit in this room. Wolfhound from other room needs to remain your little secret - no cameo appearances in next set of photos. I envy you your pet, but some people are put off by the thought of dog smells from the carpeting every time it rains.
Cover your bed base in white and get a white duvet cover. If possible move those chests of drawers from either side of your bed and get bedside tables instead. Put a few books and matching lamps on the bedside tables (if new furniture is out of the question, then put matching lamps and a few books and/or big candles on top of the drawers). Need artwork on the bedroom wall. Don't hang it too high - map in dining room is too high. Take visible items (they are just about visible) from the top of what I assume is a wardrobe on the right of the master bedroom photo.
Bathroom photo needs to show what the floor is like - is there anything keeping shower water from flowing freely into the room? Entire bath needs to be shown. Need plant/ candles on window sill.
Kitchen photos need to show kitchen appliances, countertop, general size, plus the big storage/pantry, plus the back door - so you need at least two and preferably three photos of the kitchen.
Kitchen itself - can you paint over the dated greige/floral tiles? Maybe in a nice fresh colour in the light blue or green family?
Sitting room - is that a desk tucked away into the far corner? That function for the space should be reflected in its own photo. Pull the couch from beside the desk (or whatever it is) into the room. Coffee table should be out on the rug with a bright candle, some books, a quirky objet d'art on it. Big, oversize plant left or right of the fireplace emphasises natural light and reduces angularity of the room. A neat pile of logs in some attractive/rustic container by the fire would also add to the homeyness. Address the watermark problem (?) on the coffee table. Big mirror over fireplace. You need that floor lamp over by the window (left side of window as you look at the fire).
Your curtain colours throughout except for the sitting room are heavy and a bit drab. I would replace the olive/khaki with a blue or red, or even white. Dining room might benefit from a brighter colour.
Put some patio furniture and pots of shrubs/flowers on your nice deck and include photos.
Your floorplan needs room dimensions.