Revelation can be a tough book to understand. Here are links to a few resources that may help.

Verse by Verse- Warren Weirsbe’s Commentary on Revelation

End Times Theology- Things to Come by J Dwight Pentecost

End Times Theology- Prophecy for Today by J Dwight Pentecost

Bible Study Software- E-sword Bible Software

E-Sword Bible Study Software for Bible Study, Discipleship, Teaching, and Preaching