How Can I Reveal and Defend My Belief in the Trinity and Leave My Oneness Church?

Questions about how a teen can reveal and defend her belief in the Trinity and leave her Oneness church and whether church memberships that exclude people living a homosexual lifestyle create a two-class system contrary to Jesus’ strategy of hanging out with sinners.

• How do I, as a teen, reveal and defend my currently hidden Trinitarian belief to my Oneness parent and church friends and leave their church?
• Do church memberships that exclude people living a homosexual lifestyle create a two-class system contrary to Jesus’ strategy of hanging out with sinners?