“My narcissistic dad raised me in immorality!”

How do I forgive my narcissistic dad for the childhood I missed? How do I avoid falling into the same traps today? How do we approach believers who are engaged in sexual immorality? What if they are justifying it? Is it good to debate people of other faiths when they knock on our door? How do we counter others and convince them that we have the truth? I feel overwhelmed by all of the trouble in the world, and I begin to feel despair, even when I pray. What can I do?