Next, screw marketing - you don't need that right now. Maybe you had bad advice or just made it up, but what you need is sales - very different from marketing. You are the best sales person because you're the one who saw the need and believes in your solution. Forget websites and blogs and social media, that's not right for you - just talk to people and get them talking to people, until you can make contact with and sit down with potential customers. Tell them about the solution, land your first big friendly client and make them happy.
Just my 0.02 based on real life experience :)