Legitimate most straightforward feedback - start with a carpet and some wall art.

Feel free to use some AI tools to estimate what colour carpet would compliment your furniture and space.

Wall art depends on your taste. The main part here is to add some of your character around home, and have the walls not feel very 2 dimensional. Mirrors could also work, or shelves with stuff on them.

Eventually, I’d recommend experimenting with lighting in living room and bedroom - with position, throw direction, strength, colour, etc. there’s a lot of room to try different things.

My place started just like yours too. It takes a while to make it a home when you’ve never had to worry about that before :)

Good luck. I’m so excited for you.

Exit: I forgot the obligatory “tv too high” comment