All the Apostles were practicing Jews, who believed Jesus Christ to be the fulfillment of Judaism, the Messiah. That, in hindsight, made them Christians. Would Peter have recognized a huge, worldwide organization based in Rome, that claims him as their founder? Or would he recognize people following the Messiah as he did, as the church?
As far as the Bible, the glory belongs to God, at whose behest the Bible was compiled. Catholicism played an important role in compiling and editing pre-existing texts, and for that all Christians are grateful. Outside of that, it’s sort of crass for a particular sect to claim ownership of the Word of God, especially one that branded those who attempted early translations into languages other than Latin as heretical, as was the case with John Wycliffe.
Read about what they did beginning with Acts. The Catholic Church is the outgrowth of ALL they did. Remember, they did this for the first 70 years with nothing written. It is also useful to get some other perspectives from the fathers, the Didache and other relevant sources, especially when so much happened in the growth of the Church before the Canon was assmbled.
As to the Bible, grouse all you want, but the Catholic Church is the organization that assembled the Canon and continues to infallibly interpret it down to this day, and yes, before you go there Sacred Tradition also transforms us as Catholics.