The priest doesn't have the power to forgive sins. Pray to God. Use the ACTS model of adoration, confession, thanksgiving, and supplication. Pray not only for your needs but also for the needs of others. This is some of what the Bible says about prayer:

(Matthew 6:5-7 NIV) "And when you pray, do not be like the hypocrites, for they love to pray standing in the synagogues and on the street corners to be seen by men. I tell you the truth, they have received their reward in full. {6} But when you pray, go into your room, close the door and pray to your Father, who is unseen. Then your Father, who sees what is done in secret, will reward you. {7} And when you pray, do not keep on babbling like pagans, for they think they will be heard because of their many words.

(James 4:2-3 NIV) You want something but don't get it. You kill and covet, but you cannot have what you want. You quarrel and fight. You do not have, because you do not ask God. {3} When you ask, you do not receive, because you ask with wrong motives, that you may spend what you get on your pleasures.

The Lord's Prayer is a model prayer. It's not something to just recite.