The “Church” is not the Catholic Church. It is the communion of saints. Not sure where the Bible talks about the Catholic Church, where I was a member for 35 years, being the Lord’s Church.
The Bible doesn't talk about the Catholic Church, except for "on this rock you shall build my Church". Jesus chose Peter. Unbroken Apostolic succession every since. Jesus who is God founded the Catholic Church; the one true Church. This is the foundational reality. Hope you return soon.