First Off I want you to see how important this chapter is.
And that this chapter is for sure about the judgment.

What will such a one do in the day that the books are opened and every man is judged according to the things written in the books? {9T 266.2}
The fifth chapter of Revelation needs to be closely studied. It is of great importance to those who shall act a part in the work of God for these last days. {9T 267.1}

Do you want to act a part for God in these last days?
You might want to study this chapter then.

Rev 5:­1 "And I saw in the right hand of him that sat on the throne a book written within and on the backside, sealed with seven seals."

There in His open hand lay the book, the roll of the history of God's providences, the prophetic history of nations and the church. Herein was contained the divine utterances, His authority, His commandments, His laws, the whole symbolic counsel of the Eternal, and the history of all ruling powers in the nations. In symbolic language was contained in that roll the influence of every nation, tongue, and people from the beginning of earth's history to its close. {9MR 7.2}

Many like to start Revelation 6 during the time of John, but is that true to the opening of the seals?
Something to think about.