Any advice on this?
I try to use the feel of our world to describe my worlds in my writing. Try finding an open, but not too open, place, preferably a forest or a park but even a city plaza surrounded by concrete buildings will work, then sit for 15 minutes. Observe your surroundings with your eyes, overlay the world of your fiction onto this world, see what things become. Then close your eyes, listen and feel your surroundings, again pretending it's your fiction world, what do the sounds you hear represent. In a city plaza, the buildings can become trees, the car horns the call of wild creatures, the smells the taste of exhaust into a pungent smell of a bad smelling flower.
I know this sounds all artsy but try to capture the feel of the location, and when you write, try to recall bits of the feelings you felt to use in the description.