To become a new Freelancer all you have to do is press the big button on the front page and enter the information.
You need to do this before you place a freelancer ad. Placing an ad will make you visible to the people coming here looking for someone to do their work.
Optionally Paying a dollar or two can get your ad more noticed in the top slider.. The slider only accepts your ad if you have an image for the ad, so a copy of a business card or something can really help you get the word out.