The institutional church can outline for us the "official" church teachings, but it is we, individually and together, as the entire Church, the People of God, who must decide what we believe.  A good place to start is the Creed(s), our only source of dogma, along with the two ex cathedra statements.  These are our only unchanging beliefs, although they may indeed be enlarged and clarified.  Everything else, all the doctrines, disciplines, rites, rules, and rituals may be enlarged, changed, or even suppressed, as many have been over the years.

In the end, we will be judged not on our beliefs but on our actions.  The Two Great Commandments require that we love God and love our brothers and sisters.  Since God needs nothing from us, the way we show our love for God is by loving God's children.  Simple but not easy.  That's it, that's all.  No confusion there.