I hear you brother, I too grew up Catholic and went to a Catholic School. During college I fell away from Christianity as a whole and was an atheist for some time. A few years ago I came back to the faith and attended a typical non denominational church with the rock music and hip looking pastor. As I grew closer to God, I started going to a more traditional reformed church that had a verse by verse approach. Eventually, I found Catholic Apologists on social media and all these things I believed about Catholicism that were supposed to be “unbiblical” were misrepresentations of what the Catholic Church actually teaches and on the subjects that Catholics and Calvinist Protestants disagree I found the Catholic position to be more persuasive. We all read Scripture through a set of glasses that were haded to us by someone. Because the different glasses have contradictory views such as on baptism and the Eucharist, only one interpretation can be correct. The idea that we can read the bible without bias and come to the true understanding of it sounds good, but it’s not reality. The bible has to be interpreted. The question becomes, on what authority can you or anyone interpret the message in the Holy Scripture? I encourage you to read the writings from the Church Fathers, such as Ignatius of Antioch, to see what they believed. Here is a video that I think you may find helpful.