Create a Portfolio
The key to getting freelance writing jobs is, simply, writing. Whether this is for a blog you haven’t even shared with a lot of people, a school newspaper, or another online publication, there is no sample too small or insignificant. Just write. And write some more. And keep track of what you're writing. Cultivate a portfolio of samples you can be proud of, on topics you care about, and you will instantly have an edge up on much of your competition.