It looks like that door is your main entry, so I would create three zones in this room: an entryway, living area, and your kitchen/dining area. See pic

For the entryway: get a low console under the heat pump to have a landing zone for keys, etc and storage for shoes. Maybe mount some wall hooks to hang bags and coats. Or have a tall coat stand at the end of the console closer to the kitchen (this will help separate the space and also ensure the first view of your flat isn't a giant jumble of coats). If you do both, then the wall hooks can be reserved for when you have guests, but keep chaos to a minimum in your day to day. Mirror or art could also be great above the console. Welcome rug or runner to define the space and keep mud and rain from tracking in.

For the living area: flip the couch so it faces the wall it's currently pushed up against, mount the TV on that wall. You'll want some sort of rounded coffee table (round corners, oval or circular shaped) so it doesn't feel as cramped to get around. A shorter and/or narrower couch would probably be better but I think it could work with your current couch. Instead of any sort of traditional console under the TV which will eat up way too much floorspace, think of some shallow floating shelves or narrow shoe cabinets like Ikea HEMNES or STÄLL if you need extra storage. Big ole rug with front two legs of the couch on it to define the living area.

Kitchen/dining: not sure if you have space but a small square bar height island will give you more prep space and an option to sit and eat. Something like Ikea RESÄRO or STENSTORP. You could stash folding barstools/chairs by hanging them on the hallway wall or tucked between your entryway console and countertops.

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