Hi Angelina and welcome to CAF and how wonderful you are seeking to come fully back to the church.This is truly a blessing.God bless you
Please try to remember God already knows your heart and your sincerity.Take courage my friend and go to confession.Write down what you want to say before you go (briefly) and take it in with you.You could start with"Bless me Father it has been about 20yrs since my last confession".The priest will be thrilled that you have taken the courage to attend confession (‘sacrament of reconciliation’).Lent is a perfect time to dso this to

ur parish priest tells us regularly how wonderful it is for any priest to have soemone come back to the church after time away.After all the priests main role is for our souls, so you will be warmly welcomed.I don’t know where in the world you live but im positive your local priest will be very welcoming.
You don’t have to go to your own parish if you prefer you can attend any confession at any parish anonymously.Many people are and have been in your position,please take heart that you aere very welcome back my friend.
‘The basic requirement for a good confession is to have the intention of returning to God like the “prodigal son” and to acknowledge our sins with true sorrow before the priest.’
If you need help–especially if you have been away for some time–simply ask the priest and he will help you by “walking” you through the steps to make a good confession.’
Reconciliation is the act or state of re-establishing friendship between God and a human being, or between two persons. When one sins, after baptism, this sacrament is needed to restore one’s relationship with God. Also, since all Christians are connected together through the body of Christ this sacrament reconciles one with the church. Belive it or not, but when one sins he/she is destroying their relationship with God. Sin damages or even breaks fraternal communion. This sacrament restores it.
Prayer to St. Gerard Majella for a good confession.
St. Gerard, Patron of a Good Confession, who gave courage to souls whom fear and shame had overcome; who gave sorrow to their hearts, resolution to their wills, truth to their faltering lips; help me to make a good Confession.
Enable me to know my sins, to be truly sorry for them, and to be firmly resolved, with God’s grace, never to sin again.
Help me to confess my sins humbly and sincerely, to confess them in the spirit of faith, as confessing them to Our Lord Himself.
Stand by me in this Confession, O gentle Saint, an angel of God sent to free me from sin. Amen.