Q. 1. Does it make a difference who we pray to? Or is it better to pray to the Father than the Son? I sometime pray to the Father. Then I wonder if it is wrong because I did not pray to Jesus who is God.
A. 1. Jesus said, "I and the Father are one.” [John 10:30] So it does not matter who you pray to, the Father or the Son, you are still praying to God.
Jesus also said, “I am the way and the truth and the life. No one comes to the Father except through me." [John 14:6] This second verse does not contradict the first one. Jesus said it to indicate that He was God incarnated, God having taken human flesh. If a person prays to the Father with the intent of rejecting Jesus as God, then such a prayer is not acceptable. Because the Father and the Son are One, the Son cannot be rejected in favour of the Father only.
So it makes no difference if you pray to the Father or the Son, providing that you accept the Catholic Church teaching of the Holy Trinity, that there is One God, but three Divine Presence in God, the Father, the Son and the Holy Spirit.