Lou Redmond said,
"We never write as well as we want to, we only write as well as we can."
In a 2002 study at Ben-Gurion University, people who wrote about stressful events made fewer visits to health clinics over the next 15 months. And researchers at Chicago Medical School found that when cancer patients without family support wrote about their illness for 20 minutes a day, they reported less stress for up to 6 months. (from "Getting Started as a Freelance Writer" - Robert W. Bly)
"If you want to make money as a freelancer, stop thinking of yourself as a writer first. Instead, consider yourself a self-employed businessperson -- whose business happens to be writing. That means you are no longer writing for satisfaction. Now you're writing for money. That simple fact is a major mind-set change for most freelancers." (From "Six Figure Freelancing" - Kelly James-Enger)
So, if you want to be a writer, write. Read. Pay attention to what is around you. Read old classics. Start a blog; its fun, its work, its discipline; it can get you immediate responses on your writings, and its one of those things were you get better simply by just doing it.
Bottom line is, just do it.