Hi Melissa. When you go into the providers ad section, there is a sticky at the top of the forum with instructions on becoming a "verified provider" and the benefits of doing so.
Here is a link:
http://www.eccie.net/showthread.php?t=204229
In a nutshell, you have to have reviews from one of the major boards or a referral from another verfied member. Once those items are submitted, then it's just a matter of requesting verified status which will allow you to post weekly ads and create a free showcase. Good luck.
As a newbie, it might also be beneficial to read over the forum guidelines. One of the tabs at the top of the eccie homepage is labeled "forum guidelines" so that is always a good start as well. Here is a link for convenience.
http://www.eccie.net/announcement.php?f=5