Because it is so difficult these days to find sound doctrine teachers, if you are a believer, I recommended that you ask God for the guidance of His Holy Spirit & read the Bible yourself first, before accepting the opinion of men.
Some time ago I was asked my opinion on the Bible Project’s videos about the book of Revelation, & at that time I mentioned about doing a post on the subject later, well I have taken more time than I expected.
The main character of the entire book of Revelation is the Lord Jesus Christ, in chapters 2 and 3 we saw the risen Lord from heaven addressing the churches on Earth. Now after chapter 4 the scenario changes completely, placing the readers in Heaven. The Apostle John sees a door open in heaven & a voice calls him “Come up here, and I will show you things which must take place after this.” He then sees a throne in heaven & heavenly worship.