I think one thing you can definitely do is change your camera angle! Right now, it’s like a photo is being taken on the worlds tallest tri-pod, or by a giant man. Bring the camera down, to a normal height, and have it more or less straight on, rather than tilting downwards.
I also think your materials can use some work. Currently everything looks flat. I’d recommend going to https://ambientcg.com/ (used to be cc0Textures) and looking at some of their pbr materials which you can download and use completely free. I’d also have a look at pbr shaders in general, as it’s going to help you a lot in this project.
My final suggestion would be to change the window in some way. From a practicality point of view, would you really have a huge window in a bathroom, where someone outside can look in? Maybe frost it, or do something with the background - as currently, this is one of the biggest draws to the scene not being realistic
You’ve got a solid foundation to work with though. It’s a really good start!