Too broad a question asked. Specify what you do not understand.
Google "Blogs freelancers" there will be information. And on account of "not water", it is unlikely, no one in this area to put in the mouth chewed will not. The competition is the same.
How to acquire a permanent base of customers, on a stock exchange it is better to start how to select the orders to which you should respond, etc. I'm not asking for everything ready on a silver platter, but based on the one described?
Right away orders - those which you definitely will overcome in time and with high quality.
Exchange - any of thousands of them. There's a link "frilanser" can and there. I do with the forum section "Freelance" started.
Regular customers will themselves, if they see that you are really good at making product.