Can you tell me what Joel 3:2 is describing and if it has been fulfilled yet?
No. Although WT has abandoned the typical anti typical rule applying to every single prophecy, some prophecies have more than one fulfillment. In the Insight Book under the Topic Jehoshaphat explains this verse is symbolic to mean God’s judging the nations for mistreating JW. The topic doesn’t say much more. Also, God doesn’t talk to me or to other JW dictating the meaning of the verse. My belief is only interpretation or commentary on what the verse means.
Can you tell me if according to the Scriptures in Rev below, are the trumpets blown in chronological order and if the 42-months take place during the 6th trumpet and are part of what is called the 2nd woe?
I don’t know. Years ago WT published the Rev book commentary on Rev. I don’t know at present how much of that commentary is still believed to be true. I apologize.
Do you/JW's believe the 1,000-year reign began in 1918 and we are 105 years into it?
At present, JW believe that Jesus began ruling in 1914. However, the millennium starts after Armageddon. I don’t know how Revelation is going to play out exactly.