Dear friend in Christ;
Each RCIA program is unique to that parish and Pastor.
Most of the same Main topical lesson are shared; but each in a manner unique to that Parish program. [I co-taught RCIA for 3 years].
“1st Confession” is a Normal part of each RCIA program and the timing and the mode of that Confession is left up to the Priest /Confessor. But in any case it is a good idea to let Father know that this is your 1st Confession and ask for his help, which he NO DOUBT, will gladly do for you.
There is nothing to fear; the SEAL of Confession prohibits the priest from sharing; even under the duress of a actual death threat, so what you share is between you, the priest and our God.
It is a good idea to gain a fuller understanding of sins:
1 John 5: 16-17
One’s 1st Confession
Know that each RCIA program is unique to that Parish
While many, but not all of the same topics will be covered, and the “Rites of Initiation” are all the same, the order of the topics and the content of each is unique to each parish
First Confession can vary a bit from parish to parish, the Confessor priest will determine the time, place and the format; which can vary from informal to the Norms for Catholic Confession which is usually structured.
Know that both God and the priest are on your side; and every reasonable effort will be made to aid you in making a worthy Confession, which will be guided by the priest. It is nothing to be worried about. But do be sure to let Father know that this is your first Confession and ask for his help.
It would be prudent to GOOGLE Catholic Sacramental Confession as a preparatory step so you have some idea of the FORM and what to expect.
Pray very much
Patrick