It’s very bare, OP. It doesn’t look homely at all and your estate agent should have advised you about this.
As others have said, rugs, plants, flowers, maybe some books.
Find a way to demarcate the kitchen from the living room. Shelving unit or something?
Opening photo is awful - it should be an interior one. It looks like you live above a shop.
You need to experiment with the sofa configuration to make the living room look a less awkward shape.
Do you have a dining table? Is there room for one. This would be a dealbreaker for me.