29m W/depression need help

Hi there, I've almost completely cleared out my living room and rearranged the sofas to make space for a TV, which I plan to mount on the wall near the entrance. I'm looking to paint the room and add décor, but in the past, I've picked up random items and added them without much thought, which has resulted in a space that I'm not happy with. I feel like it lacks cohesion and style, and I'd really like to change that. I'd love suggestions on everything-from colour schemes to furniture, décor, and layout -so I can bring life and personality to the space.