CG Didymus,
There is much to think about, in your question.
Let me see if I can make this whole idea clear to you.
In the first place, all the things written in the Mosaic Law Covenant was a foreshadowing of the coming of the Messiah, Christ, Hebrews 10:1, then notice that the Law could not make anyone Perfect. The reason that the ones under the Mosaic Law could not be considered perfect, was because the blood of goats and bulls that was used to ratify the Mosaic Law Covenant could not completely do away with sins, Hebrews 10:4,11. The great sacrifice of Jesus did do away with sins completely, Hebrews 7:18,19,24,25, Acts 13:37-39. Consider Romans 3:20-26, where Paul is explaining just how God was not carrying out the law completely, because He was looking forward to the time Jesus would come to earth and give his life as a sacrifice for all who would accept this great provision, and show it, by becoming a footstep follower of Jesus, 1Peter 2:21, 3:18-21.
Because of Jesus Ransom Sacrifice, all those who are not considerer evil by God will be resurrected back to earth, John 5:28,29, Acts 24:15.
There is another thing to understand. The Bible tells us that no one who lived before Jesus gave his life for us will be resurrected to go to heaven. Remember, when Jesus died, the curtain, or vail, between the Holy and the Most Holy compartments was torn from top to bottom, Matthew 27:50,51. That curtain was a symbol of Jesus body, after his death some of Jesus followers would be resurrected to be Kings and Priests, in heaven, Hebrews 6:18-20, 9:2,3,6-9. Really, you need to read the whole 9th chapter. Jesus went to heaven, as a forerunner of his co- rulers who also have the heavenly hope. The Most Holy compartment was a picture of heaven itself, where Jesus went to present his sacrifice to God, Hebrews 9:23-26, 6:19,20.
The ones that will be resurrected to heaven are explained at Matthew 11:11-13, where we are told that after John the Baptist, Jesus followers tried hard to enter the Heavenly Kingdom. Flesh and blood cannot enter the Heavenly Kingdom, 1Corinthians 15:50, but some of Jesus followers will go to heaven to be rulers over the resurrected ones here on earth and the ones who live through the Great Tribulation, meaning Armageddon, Romans 8:17, Philippians 3:19-21, Hebrews 3:1, Revelation, chapter 7, compares the number going to heaven as 144,000, with a Great Crowd that will be on earth. Also Revelation 5:6-10, 14:1-5, 20:4-6.
Since I don't know how familiar you are with the Scriptures, I don't know how much to explain. Agape!!!