You need to go back to confession to confess making up sins to confess. At 8 or 9 it may not be in the mortal sin category, but on the other hand it looks like that one event may have been just the sort of thing that torpedoed your Catholic faith. Even if it was not a mortal sin, you are well overdue for confession. Presuming you are older than nine years old currently.
you do not understand, the teachers at this catholic school told us we had to confess at least a sin, it cannot be possible we had none, well I assure you I had none! I was an innocent child loving everyone and happy! since when confessing our sins to GOD himself is of less value than confessing to a priest, a man?
the Lord told us how to pray;
The Lord's Prayer
Mat 6:5 And when thou prayest, thou shalt not be as the hypocrites
are: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward.
Mat 6:6 But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly.
Mat 6:7 But when ye pray, use not vain repetitions, as the heathen
do: for they think that they shall be heard for their much speaking.
Mat 6:8 Be not ye therefore like unto them: for your Father knoweth what things ye have need of, before ye ask him.
Mat 6:9 After this manner therefore pray ye: Our Father which art in heaven, Hallowed be thy name.
Mat 6:10 Thy kingdom come. Thy will be done in earth, as
it is in heaven.
Mat 6:11 Give us this day our daily bread.
Mat 6:12 And forgive us our debts, as we forgive our debtors.
Mat 6:13 And lead us not into temptation, but deliver us from evil: For thine is the kingdom, and the power, and the glory, for ever. Amen.
Mat 6:14 For if ye forgive men their trespasses, your heavenly Father will also forgive you:
Mat 6:15 But if ye forgive not men their trespasses, neither will your Father forgive your trespasses.
What is the penance the priests give you, a few hail Mary and the lords prayer, in repetition?
Look at
Mat 6:7 But when ye pray, use not vain repetitions, as the heathen do: for they think that they shall be heard for their much speaking.