I haven't read all the posts in this thread------but what I have read it seems that you are thinking this Chapter is describing the 144;000 in heaven during the tribulation -----Correct me if I am wrong here as I have not read all 3 pages -----so I am surmising here only ------
I think
This Chapter 14 is John describing what events will take place after the tribulation in heaven -----the 144,000 are not in heaven until after the Tribulation period -----the 144;000 are the 12 tribes of Jews that God protects and are Filled with the Holy Spirit to preach the Gospel to all people who are unbelievers here on earth during the 7 year tribulation and need to be saved -----along with the 2 Witnesses God sends -----who i believe is Elijah and Moses as these were the 2 who appeared with Jesus when he was transfigured on the mountain -and was witnessed by some disciples ------
https://www.bibleref.com/Revelation/14/Revelation-chapter-14.html
What does Revelation chapter 14 mean?
Between chapters 11 and 16,
Revelation pauses its in-order description of the end times to introduce certain figures and highlight certain events. One of these events, shown in chapter 14, is a celebration which occurs very near the end of the tribulation.
John's vision here includes Jesus and the same 144,000 sealed believers who were described in chapter 7. These stalwart believers sing a song of praise to God while standing on Zion: the general area of the city of Jerusalem. The sealed believers are further described as spiritually pure, in stark contrast to the wicked people marked as worshippers of the Antichrist (Revelation 14:1–5).
Next John sees three angels delivering messages of warning and prophecy. These messages predict God's impending judgment on sin and evil. Included in these statements is a comment about those who accepted the mark of the beast, described in chapter 13. Those who take that mark are bound for eternal damnation—they are not believers. This further supports the idea that the mark of the beast is not some casual, hidden concept. Those who take it will know they are rejecting God by doing so. This passage ends with a word of encouragement for Christians who suffer persecution for their faith (Revelation 14:6–13).
The last section of chapter 14 depicts Jesus holding a sickle—a farming tool used to cut plants during the harvest. This passage symbolizes the return of Jesus, and the subsequent battle, in terms of a grape harvest. Just as mature grapes are fat and full of juice, the wickedness of unbelievers on earth will have reached a peak at this moment. Just as a winepress crushes and shreds grapes to make wine, the wrath of God will tear apart those who fight against Christ at the end of the tribulation (Revelation 14:14–20).
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As far as the 144,000 being the first fruit goes ----My view is
They are sealed by God ---they are not defiled ---they have kept themselves pure and Holy ---God purchased them from the earth to do God's service of preaching His word ---- they stay true to God's way and don't dabble in other false Religions -----
Greek word for first fruit
Strong's Concordance
aparché
Hence, in a transferred use, employed a. of persons consecrated to God, leading the rest in time:
of persons superior in excellence to others of the same class: so in Revelation 14:4 of a certain class of Christians sacred and dear to God and Christ beyond all others
