The Peculiarities of Presbyterianism: Is there a biblical basis for this stuff?

Every Christians bears a moral duty in regard to the church they attend. Every church is some kind of church. Every church is either right or wrong about what they think the Bible says. We should always go to the "rightest", best church we can find. That carries a lot of responsibility including to know what our church believes, where they came from and how they define themselves. There is no perfect church on earth. The creation of the church was a perfect ordination by God but a perfect ordination of a fallible institution administrated by fallible human instruments. A perfect Gospel and an infallible word applied by a broken and needy people. This carries with it a question: how will we know the word of the Lord? Do we need infallible Prophets producing words from the Lord? Do we need an infallible church to interpret the infallible Bible? Or is the Bible alone the sole infallible rule of faith and practice? Is the word of the Lord already spoken and confirmed by the resurrection of the Son of God everything necessary for a life honoring to God? What about covenant theology and the covenant sign of Baptism? How is that to be applied and to whom? What are we supposed to do with our children that have been declared "Holy..." by God?