As the gentlemen have been pointing out, Sarah, not all people willing to take you on a trip are really experts. Taking a class can give you enough knowledge so that gentlemen's lack of expertise will not endanger your life.
Some options:
http://www.zionadventures.com - I work as a guide with Zion Adventures, but am mostly retired. I think we are the best act out there, but we are also not cheap. you could call and see if a suitable class has an opening.
If you are up on the Wasatch Front, you might find Steve and Clark at Dark Horse more convenient, and less expensive:
http://darkhorseleadership.com/
Tom