Simple 3d Blender Room Scene animation for only 10 usd make it simple and very basic

I need a very straightforward .blend scene that looks as though a beginner (me) created it, yet still meets the assignment brief. Please start from the human model in the file I’ve attached and leave that character untextured; the focus is on the environment.

The scene: a small, lightweight house interior. A character walks in, opens the door and sits on a chair. Nothing fancy—no particle effects, no complex rigs—just basic key-frames that clearly show the three actions. Add enough lighting and basic PBR shaders so materials read as wood, metal, glass etc.; the room itself must not be left in flat grey.

Deliverables
• One Blender file (.blend) containing the animated room, chair, door, lighting and materials
• All textures packed or placed in a relative “/textures” folder so the file links correctly on any computer
• A short playblast or viewport render (MP4 or MOV) to confirm the animation timing

Acceptance
The file opens in the current stable Blender release, the door, walk-in and sit animations play from start to finish, and the scene renders with distinct materials (no pink missing-texture warnings).

Keep it simple, readable and clearly organised so it’s believable I put it together myself.