The problem is, I'm a perfectionist. What's worth doing, is worth doing right, right? "Do what you do with all of your might; things done by halves are never done right."
I'll see your well intentioned but misdirected quote and raise it by three, or maybe four:
the sarcastic They Might Be Giants with "THere's only one thing that I know how to do well, and I've always been told that you only can do what you how to do well." How obviously false. Again, how do you get to do it well? You do it poorly a lot. TMBG means it sarcastically. There's lots of things you can do, like whistling in the dark. I suspect that your writing is not crap, but neither is it perfect. Probably, like most of us, you're in the middle somewhere.
"I don't like this air, but that doesn't mean I'll stop breathing it. " Built to Spill. Mostly I just love that song. But it's also relevant. Just because it's not amazing right now, doesn't mean it's not better to keep doing it. What's the alternative living in obscurity without having tried? No thanks. keep trying, or be nothing.
Now i'm gonna get scriptural on you. "Do not run faster than you have strength." Are you strong enough to be a perfect writer? No, not yet. But the context of Benjamin's admonition clearly tells us that we DO need to run. We're just not expected to run faster than we can. it means, quite literally, that God doesn't expect your writing to be perfect, how arrogant of you to expect it of yourself. By the same lines we have the "be ye therefore perfect" commandment. The Savior didn't mean be perfect this instant. He knew that wasn't really possible. He meant it as a goal. It IS something you can eventually do. Probably in the next life. But you can get there. But first you have to be crap. "Then I saw through a glass, darkly." "milk before meat." Right (attribute those to St. Paul)? you HAVE to start off being bad. that's how you get good. He will make weaknesses strength (Ether told us that, but it's a paraphrase, not a quote). But only if you exercise them.
Last of all, you have a talent. you're proposing to hide it. The guy who hid his talent got thrown out. The guys who went out and risked losing their talent rather than hiding it doubled their talents, and then were rewarded with EVERYTHING. Another paraphrase, from Jesus this time: if you use your skill (your writing), your writing will gradually get better (line upon line, here a little, there a little, it's exactly what writing is). If you don't write, however, it'll be completely taken away, along with other beautiful things in your life. You can't stand still in this world. You either move forward, or you fall behind.