I have studied Revelations in depth, as have a few others on this forum, for example
@marks.
Inanutshell, God divided His creations from the beginning, and set the stage of more prophetic divisions throughout history.
Jesus reiterated the division, particularly regarding people.
Revelations is all about Accountability and Consequences and Separations of the Divided, and their eternal expectation;
regarding, People and Angels; from the span of
creation to end of mortal days.
The study for that span, can get very intense.
Just saying, it is deep, extensive, and more than just grabbing a Scripture here and there. So agree with your first statement.
Glory to God,
Taken