Call around to see which local agent takes new actors (and see which is the most helpful on the phone). Then make an appointment with a local acting agency that takes new talent and see if someone will talk with you about what you need to do to get prepared for them.
Word of warning: no not do an agent that requires a fee. Good agents only get paid when you get work. The exception is buying headshots, etc.
Here is a list of SAG approved agents. The best agents will be on this list: http://www.sagaftra.org/agency-relations/sag-franchised-agents