We are headed into the second half of the book of Revelation. Here’s a video from the Bible Project to help you grasp some of the larger concepts and important themes in the chapters 12-22 of the book. If you need a recap of chapters 1-11 click here. May God reveal His greatness to us as we finish reading through the NT.
Understanding the Book of Revelation: Part 2
Travis Agnew 
Marty Miller