The Catholic Church vs Orthodoxy. Part 1. The infallibility of the Pope

[Jonikster]

Hello.
Please sorry for my english.
My name is Constantine.
I was born in Orthodox Christianity. However, over time, I began to gravitate toward other faiths.
I would like to go to the Catholic, but there are things that I do not understand.
I would like to get a theological education, but the choice of denomination to do before.
I ask you to guide me to the right path.
I would like to ask about the 3 topics, but there is a maximum allowable number of characters 3200. That is why I divide it into 3 topics.

1. The infallibility of the Pope.
   According to the teachings of the Catholic idea of papal primacy is as follows: "The primacy of the Apostle Peter and his infallibility in matters of faith, the Lord promised him, passed to his successor - the Bishop of Rome. The apostle Peter and his successor, Bishop of Rome, there is the Catholic belief that the rock on which the Church is built. "
   Thus Catholics refer to the words of Jesus Christ, the Apostle Peter said in the Gospel:
   And I tell you that you are Peter, and on this rock I will build my church, and the gates of Hades will not overcome it. I will give you the keys of the kingdom of heaven; whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven.” Matthew 16.18-19.
   But papal infallibility dogma was adopted at the First Vatican Council in 1869-1870, respectively. In fact, it came first.
   For the first time the Pope refers to its succession from the Apostle Peter, “which adopted all bases of the Church” in a dispute about the systems cross, heretics at Cyprian. Then Pope Stephen began to demand from the African Church to act on Roman practice. In 255 at the Council of Carthage in the decision not to recognize the baptism of heretics and keep existing practices in Africa. On hearing this, the Pope writes in Carthage and again requires taking Novatians only through repentance and of Cyprian of Carthage calls the false Christ, false apostle, wicked slave.
   In a letter sent to the Byzantine Empire in September 865 years, Pope Nicholas argued that the judge Ignatius could not subordinate bishops, that the right to trial patriarchs belongs only to the Holy See, that without the Pope consent invalid and decisions of the councils and the pope, as the successor of the Apostle Peter It has power over the whole Church.
   Question about the actions of Pope Nicholas, Photius decided to bring to all Churches forum. Council was held in Constantinople in the summer of 867. His acts have not been preserved. We only know that it was a very large cathedral, and he condemned Pope Nicholas. It seems that at this council was condemned by the addition of the word Filioque to the Creed.
   The Church “is not infallible because that is holy, and because it has a supreme high priest”, through which the Spirit of God always works when needed.
   At the moment, I believe that the dogma of the infallibility of the Pope is an attempt to de facto monarchy of the entire Catholic Church. And Dad can act according to their own convictions.