I certainly couldn’t doubt the words of Jesus, the divine Son.
He is the ultimate authority on how to address the Father, so why should we doubt His word?
It is not the only prayer we can rightly offer. Prayer takes many forms, but it is definitely not the case that we shouldn’t pray "The Lord’s own Prayer!
1 One day Jesus was praying in a certain place. When he finished, one of his disciples said to him, “Lord, teach us to pray, just as John taught his disciples.” 2 He said to them, “When you pray, say: “‘Father, hallowed be your name, your kingdom come. 3 Give us each day our daily bread. 4 Forgive us our sins, for we also forgive everyone who sins against us. And lead us not into temptation.’ “
THE LORD’S PRAYER
2759 Jesus "was praying at a certain place, and when he ceased, one of his disciples said to him, ‘Lord, teach us to pray, as John taught his disciples.’"1 In response to this request the Lord entrusts to his disciples and to his Church the fundamental Christian prayer. St. Luke presents a brief text of five petitions,2 while St. Matthew gives a more developed version of seven petitions.3 The liturgical tradition of the Church has retained St. Matthew’s text:
Our Father who art in heaven,
hallowed be thy name.
Thy kingdom come.
Thy will be done on earth, as it is in heaven.
Give us this day our daily bread,
and forgive us our trespasses,
as we forgive those who trespass against us,
and lead us not into temptation,
but deliver us from evil.
Matthew 6, 9-15“This, then, is how you should pray: “ ‘Our Father in heaven, hallowed be your name,
10 your kingdom come, your will be done, on earth as it is in heaven.
11 Give us today our daily bread.
12 And forgive us our debts, as we also have forgiven our debtors.
13 And lead us not into temptation,but deliver us from the evil one.’
14 For if you forgive other people when they sin against you, your heavenly Father will also forgive you.
15 But if you do not forgive others their sins, your Father will not forgive your sins.
Whatever opinons people may hold, in their quest for truth, these are words given us to pray by our divine Redeemer Himself.
God bless you and your inquiring daughter.