What kind of freelance writing are you interested in? What topics?
I don't know what kind of freelance you would be interested in, but I really think you could as well. Until I entered the small business realm, I thought it was a lot about credentials. Now I realize it's about "creating a good product" (your writing) and marketing it--thinking creatively about how your skills could benefit different ones. Then emailing (spamming! woohoo! LOL) them offering your services. A good product and an idea about why it's relevant to them can speak volumes more than any credentials.
Just my $0.02.