Start off with a basic blog so you can build your skills and your portfolio then apply to a few writing sites like Helium.com and zerys.com. These places let you write for money, frequently they are small 'fluff' type articles, but they still provide cash and cash is good. I've been writing for a few years now and have advanced beyond those sites, but I still occasionally return to them when I need to supplement my income.
Once you get into it you can stick your name on the articles and you not only get paid for writing the articles, but you also get paid for traffic generated to the articles.
Check out a few of my earlier articles and I will admit that they aren't spectacular, but they are decent and had earned me some money;
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