So your course is that the NT isn’t reliable and that we shouldn’t be using it.
Fair enough.
I can’t argue with someone who believes that only the OT is inspired. All I can argue is that you’re not a Christian.
That of course is a perverse conclusion except under the Roman model, as in fact the means by which the church was established as being of God, and likewise a true man of God is, enabled further writings to be established as being of God. But which were not established under the premise of a perpetually infallible magisterium, which defines the NT etc. as teaching it is perpetually infallible, thus it is.