If you want to learn what's right and wrong, read your Bible! There are so many people trying to teach us so many different (and often opposite) things that it can be really hard to know what to believe. That's why the Bible is so important. It's all useful for doctrine, that is, for knowing what you should and shouldn't believe. There's no teacher like God, and He would love to show you the way. The Whole Bible is useful for teaching.