Looks very plain. But an amazing build doesn’t come from nowhere. The only thing I can suggest is add more detail. Keep it up and your skills will improve.
Do you think I should add more detail to existing objects or create new objects (such as chairs, tables)? I feel like it might get cramped and players won’t be able to move freely if I pick the second option.
The existing objects. Or you could go for a whole new style. The choice is yours. I suggest you try and make the already existing objects look better. Good luck!