Plan?!

Week 1 - Research and gather reference, start planning things.
Week 2 - Figure out the environment design and start the blockout.
Week 3 - Finish the rough blockout, create simple lighting & mood.
Week 4 - Start planning & creating some modular sets for buildings, create a blueprint construction script to build houses out of the modular pieces.
Week 5 - Finish off creating modular pieces and replace the blockout buildings with the new modular ones, add roads/ paths.
Week 6 - Create any architecture/ large assets that aren't modular (High & low poly, LOD) and replace the blockout meshes in the scene with them.
Week 7 - Dress the town with some smaller assets (placeholder meshes), dress the cave with smaller rocks.
Week 8 - Start creating any tiling textures that are needed (Quixel Suite, or high poly & bake down to a plane + Photoshop), and start setting up the materials.
Week 9 - Revisit the small assets/ props. Create High/Low poly and LOD, textures, and replace the placeholders that are in the scene.
Week 10 - Revisit the cave; add some vegetation & interesting cave elements. Work on the lake (mostly the shader).
Week 11 - Finalize the lighting, atmosphere, post-processing. Create the final cinematic.
Week 12 - Final Presentation