For each level, I'm giving myself two tasks: a large build and a small build. Each must serve one specific functionality, so that once my world is more fleshed out, I can travel between builds to get specific things.
My large build was a log cabin/storehouse, made of oak and stripped spruce, with lots of chests inside. I haven’t fully organized it but as I get more items in this world, I'll start sorting things where they need to go.
Technically I made two smaller builds: an arboretum and a farm. I collected every (Overworld) wood type and planted them in the arboretum, with a storage shed to keep wood and saplings from each tree. The farm isn't too fancy, just a few rows of crops by the ocean and a composter for bonemeal.
Now I've progressed to the Stone Age, and I'm excited to see where this world takes me next!
To be continued...