To get the profile you will need to have a review published of you.  You should encourage your clients to become TER members and write a review of you.  They do not have to pay in order to do this.

However, even without a profile, you can post and even place ads on TER.

The secret is to thoroughly read the Self Help Manual (or Newbie Manual) that is linked on this page.

In there will be all the rules for what you must do to link your posts to your ad or website (It must have a TER logo on it.) and how to advertize (On local boards, not more than once in any seven day period.)

When you get a profile, it will contain a list of your reviews and vital statistics, plus  links to your site(s).

Best of luck and keep reading this board in order to learn more.

"I am not sure I met anyone yet on this site"

Tell your clients about TER and if they are not members tell them they can join for free and that you would appreciate a review.

Note however, that TER has sometimes rejected reviews when both the provider and the reviewer do not have a track record here.  You can advertise on the closest regional board here and state your general location and give an email address or link to your website (as long as it has the TER logo).