How do you get truth? You have to be a disciple of Jesus Christ.
How do you know if you are a disciple of Jesus? You have to hold to His teachings.
What does that look like? You have to do what He says.
How do you know what He says? You have to study the Bible. Make Bible study a daily part of your life. But don't just read the words; seek to deeply understand them and make connections across the books of the Bible. Dig and study and seek - and you will be blessed.
Try it.