Unity 2D Background tilemap & tiles design. 2D

Hello, I need to create a tilemap & tiles for my personal RPG game. The gap is a scrolling 2D game. I need the tilemap & tiles to be set into scenes. Each scene should be the same size as the attached example. The design concept (what the graphics should look like) is also in the design example. I have also added the player sprite so that you can see the size of the player and do the design accordingly. It's a retro design, so everything is pixellated as the design example & player sprite. When you do the tilemap, it should be done in layers with composite colliders & rigid bodies (gravity set to 0) done for the "Objects layer" that includes trees, mountains, houses, water, etc. The other layer is the ground layer that the player moves on such as grass, flowers, paths, bridges, etc. In total, there will be about 40 scenes to be made, but there is a lot in common between most of them in terns of objects & design. I am using Unity 2019.3.9f1 so everything you do should be compatible with this or later. Once we agree on the project, I will share the worldmap that I have so that you follow it when creating the world. My game screen setting is set to 16:9. Thank you!