Read. Watch. Ponder. Pray.
Read the original. Read summaries. Read what others think. Record your own ideas. Make your own comparisons. Think for yourself.
Watch video presentations that clarify key points and concepts. Watch experts explain what they've learned. Watch others describe their own experiences.
Ultimately, the truth is for you to discover. Ponder what you've learned from others. Then pray and ask God to reveal the truth to you.