I imagine sometimes that writing descriptively must be like painting, though I’ve not done much painting in my life. You get an idea in your head, and you choose the right colors, the right palate, the right style, to get the image you want across. Is finding the right word like finding the right color or tone? Each skill has the objective of putting a picture before someone. A clear vision of what was in the creators head, or a capturing of some scene from real life on paper/canvas.
When you see the scene in your head that you want to describe, take time and pleasure with getting it right, the way an artist might take time and enjoy making a painting. If you rush through out, it’s going to end up being a quick pencil sketch with no weight or flavor.
Take your time, enjoy yourself!