Hi! To answer your questions to the best of my ability:
- There is no specific rules about selecting natures — you can roll randomly or pick, or something else.
- A place is a unified location tied together thematically by the natures selected. So for example, an Island Workshop Glen might be a Greek-inspired cliff-covered isle (the island) overflowing with vibrant life due to island biodiversity (a metaphorical glen) and inhabited by an order of weaver-nuns (the workshop). Or maybe it's a village built around an artistic workshop deep in the woods and surrounded by rare butterflies, that is cut off from the rest of civilization. Or something else!
- There should be 6 lines. I don't know why there are only 4.