When I was in RCIA, there were some who were baptized Christians coming into the Church who were ready for Confession way before the rest of the group, they understood, believed, felt the need, and Father agreed that they were indeed ready. Those few did recieve the Sacrement of Confession for the first time during Advent.
All of those who are baptized Christians will go to Confession at some time after the Rite of Acceptance and before Easter Vigil. If you are Baptized and have gone through the Rite of Acceptance, well, Confession is the next step. I agree, talk to your Pastor about this, if you are not ready, there will be plenty of opportunities before the Easter Vigil.