But premade rooms can be a hassle when working with colliders, so I would recommend using these pictures as a reference to build it piece by piece from prefabs. You can use references from other games or real interiors too, it's pretty easy!
If you have trouble putting game levels together, you can send me an email. I would send you some cool references and videos that will help you to improve the design of your scenes. I have little, but some knowledge in game development, that might be helpful to you. I'm always open to help
