I’m glad you had an experience of how Latin promotes the universality of the Catholic Church.
If you study the Bible closely, you will notice that the New Testament includes instructions to obey precepts that were conveyed orally, not in writing. You cannot be “Biblical” without recognizing the existence within the Church of an oral deposit of the faith transmitted through apostolic tradition.
The Catholic Church is the only body that can tell you why you can be confident that the Bible is God’s word. Come back to the Catholic Church.
As a Protestant I've heard and read many teachings on why we can be confident that the Bible is God's Word. And I've taught it myself. You haven't been out much if you think the RCC has a monopoly on the topic.
Irenaeus -- "We have learned from none others the plan of our salvation, than from those through whom the gospel has come down to us, which they did at one time proclaim in public, and, at a later period, by the will of God, handed down to us in the Scriptures, to be the ground and pillar of our faith."
Basically as early as the 2nd century Irenaeus and Tertullian were teaching Apostolic Tradition, and once the apostles wrote it down as Scripture it's the ground and pillar of our faith. Neither Irenaeus nor Tertullian said to abide by tradition that was not written down as Scripture. In other words, tradition not written into Scripture doesn't qualify as the kind of "tradition" they said as the ground and pillar of our faith.
St. Paul adjures his recipients to keep "what you have heard from us either by letter, or by word of mouth." And St. John says that he's only written down a fraction of the things that Christ said and did, because if he told everything there wouldn't be a book (scroll) big enough to hold it all.