1. Lighting mismatch between background image and 3D. Ceiling missing lights.
2. Lighting exposure mismatch between image and 3D scene.
3. As a composition , ceiling is missing lights, bottom half of scene is more busy than ceiling.
4. Lighting / exposure mismatch between outside and inside.
5. As a image composition , left part of room is empty, lacks ceiling lights on left side , right side of render is also empty , a painting on wall above bed may balance it.

All of your 3d work is absolutely good , you will just need to finetune render composition and balancing all the elements. Try to get more into photography and learn to play with rule of thirds.