Good luck with the journey. I like your drive and the fact you are willing to start building a few sites for free. Obviously thats not a good strategy for the long-term but thats the sort of mindset that will help you drive your way into your target audience without fail. Once you get a few happy customers promoting your company then the work will definitely roll in. My only advise on that front is make sure that you treat them like paying customers in terms of workflow etc and then invoice them as you normally would, but add the 100% Discount. That way they are going to be promoting the service they actually received (As well as the true price tag that should go with it). Otherwise you might end up with everyone looking for freebies.