I have been to confession several times. You ask the priest when you're ready and he takes you into a private room in the hall and you do the general confession statements as he is your witness then you're done.
(It doesn't take longer than 15 minutes) ..
In most Orthodox Churches, including Antiochian, it happens in a corner of the Nave, usually right next to the iconostasis and not in a "private room in the hall." Some priests do a life confession; others give you lists of do's and don'ts that you consider applicable to your life (or not); yet others let you confess as you will. It is best to ask your priest how he wants to do this.