Hey Lewis, looks good so far!
In my opinion, there is some room for improvements on the lighting and the texture side.
For the lighting, I think you need to increase the lightmap size on the floor to get better shadows and integration.
Probably increase the quality of the bake might help too.
From the textures, I made an image to try to be more clear about the issues I saw.
Feel free to ask if you have questions.
Greetings.