There’s actually very little ceremony involved at all, so little likelihood of ‘getting things wrong’. If all else fails, simply begin by telling the priest it’s your first confession and you are unsure what to do, and he will walk you through the whole thing.
This is the way it normally happens (I’m assuming yours will happen in a confessional here):
- you enter the confessional. There will usually be a kneeler in front of a screen of some kind, at which you kneel if you want an anonymous confession, and perhaps also an additional chair facing the priest where you can sit if you want confession to be face-to-face. Use whichever is your preference.
- The priest may say a few words of greeting to you, or a short prayer, and invite you to begin. Sometimes he may well not say anything, in which case you simply start the confession yourself. Be sure he is there though - some confessionals you can’t even see the priest’s side, and you don’t want to be confessing to empty air!
- To begin, I find it easiest to use the traditional words ‘Bless me, father, for I have sinned’. You then tell the priest ‘it has been x weeks/months/years since my last confession’ or else ‘this is my first confession’, and then tell him the sins you have committed in that time, by type and number.
If you’re unsure of the number of times you’ve committed a sin, give an approximation - ‘I did x about half a dozen times/weekly for about two months/multiple times a day between about the ages of 15 and 20’ or something.
Be sure to confess your mortal sins, any sins that you think may be mortal (it’s a good idea to ask his opinion on whether they are or not for future reference), and perhaps any venial sins that are particularly troubling you.
You can even ask advice about things you plan to do in the future, if you’re worried about the spiritual consequences. But don’t worry if you honestly forget even a mortal sin - you’re forgiven anyway, just mention it in your next confession.
As a guide to the amount of detail you’re expected to go into - ‘I stole’ is way too little information. ‘I went into the bank on Thursday morning with my Colt .45, threatened the teller who was a girl named Judy, she gave me $5.010.53 …’ is way too much. ‘I robbed a bank, threatened the teller with a gun and stole about $5,000’ is about right.
When you’re finished, it’s best to say something like ‘for these and all the sins of my past life, I am truly sorry’, to let the priest know you’re finished. On the other hand, if you remember something at any point while you’re in the confessional, even after absolution, it’s a good idea to mention it. ‘excuse me, Father, I just remembered xyz …’ - he shouldn’t mind if you do this.
- When you’re done, the priest may (or may not) give you some advice about what you’ve confessed.
He may (or on rare occasions may not) allocate you a penance (prayers to say, a good work to do, scripture to read, something of the kind). If you’re given a prayer or other penance that you’re unfamiliar with, or that you think you cannot do for some reason, tell him so and he can subsitute something else for you.
He may (or may not) ask you to say an Act of Contrition. This need not be a formal prayer, you can simply tell God in your own words that you are sorry for your sins and ask His help to sin no more. If you don’t say it in the Confessional, do so once you’re outside.
The one thing he must do is pronounce absolution. To make things confusing, some priests do this WHILE you are saying your Act of Contrition. The words to listen out for are ‘I absolve you of your sins in the name of the Father, the Son and the Holy Spirit’.
- With absolution, the confession is usually pretty much concluded. The priest will invite you to ‘go in peace’ or dismiss you with other words. You then go and say or do your penance as soon as you can. If you have NOT done your penance prior to your next confession, through your own fault, this is a fresh sin and needs to be mentioned in the next confession. Don’t forget to give thanks to God for this wonderful sacrament of His mercy!