Just be open and honest. Since you are familiar with how this goes, prepare to be quickly asked about your childhood (usually are the most difficult times for many and difficult to tell a stranger.) I usually ask the psychiatrist can we please start with the now and work our way slowly to my childhood as it's difficult to bring those memories back up. I've never had a psychiatrist say no we have to start here. They simply want to build a trusting relationship and see how they can be of the best service to you. One simply said, start where you like. So overall you have control of when and how you want your sessions to go, most importantly be sure you are comfortable and everything should be fine.
