Not advice - only a note. You're not the only aspiring writer who struggles with how to use effective words to communicate exactly the right nuance. I'm not sure whether perfection should be our goal, but we shouldn't be too disappointed when we fall short of that particular mark. How much writing is flawless?

Anyway, great advice you've received so far - every bit of it - start small, visualize, simplify, read a lot of good stuff, and also some bad, practice discriminating, write, write, write. I've followed most of it myself and while I'm not near where I want to be, yet, but I'm not so far from my goal as when I started. If only I'd had a proper measure of longitude when I'd started this voyage.

good luck,
k