Is the church better or worse than most people think?
The Centre for Public Christianity has produced a massive resource on that topic. It's hours of good stuff, more than enough.
But don't miss all the other material CPX has on other topics too. There's a search bar for libraries of articles, videos and podcasts on:
In my work I focus mostly on the Foundations. How we know that the basics of Christianity are true - that God exists, that the Bible is reliable, and that Jesus rose from the dead. And how these truths fit together to make a really solid and positive foundation for your life. Core Stuff and Boost. The bare minimum info, skills, and relationship that teens really need before they leave home.
I believe if you keep this Core Stuff central to your life, you'll be far less likely to distort good things into bad.
But then what comes next?
Good answers are there. Go get 'em!