The doctrine that we go to heaven or hell when we die is completely false. The Bible teaches that when we die, we really are dead.
Ecclesiastes 9:5 For the living know that they shall die: but the dead know not any thing…
Psalms 146:4 His breath goeth forth, he returneth to his earth; in that very day his thoughts perish.
Jesus Christ went to heaven, not at death, but after his resurrection. He is the only one who goes to heaven.
John 3:13 And no man hath ascended up to heaven, but he that came down from heaven, even the Son of man which is in heaven.
The hope of the Bible is that of resurrection from the dead.
Acts 24:15 And have hope toward God, which they themselves also allow, that there shall be a resurrection of the dead, both of the just and unjust.
Death is likened to sleep.
1 Kings 2:10 So David slept with his fathers, and was buried in the city of David.
Acts 7:60 And he kneeled down, and cried with a loud voice, Lord, lay not this sin to their charge. And when he had said this, he fell asleep.
We all experience the unconsciousness of sleep. The dead will remain unconscious in the grave until Jesus Christ returns to raise and judge the dead.
John 5:28,29 Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice, 29 And shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation (condemnation).
The kingdom of God (aka the kingdom of heaven) will be upon the earth. Hence the Lord’s prayer:
Matthew 6:10 Thy kingdom come. Thy will be done in earth, as it is in heaven.
The meek will inherit the earth.
Psalms 37:11 But the meek shall inherit the earth; and shall delight themselves in the abundance of peace.
Matthew 5:5 Blessed are the meek: for they shall inherit the earth.
The kingdom of God will be the restored kingdom of David on the earth.
Luke 1:32-33 He (Jesus) shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David: 33 And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.
Christ will reign over the mortal population of the earth from Jerusalem for 1000 years.
Isaiah 2:1-4 The word that Isaiah the son of Amoz saw concerning Judah and Jerusalem. 2 And it shall come to pass in the last days, that the mountain of the LORD’S house shall be established in the top of the mountains, and shall be exalted above the hills; and all nations shall flow unto it. 3 And many people shall go and say, Come ye, and let us go up to the mountain of the LORD, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths: for out of Zion shall go forth the law, and the word of the LORD from Jerusalem. 4 And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more.
Those raised and judged faithful will be given eternal life and reign with Christ.
Revelation 20:6 Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years.
The unfaithful will be condemned to die again and perish forever. This is called the second death. This is because the punishment for unforgiven sin is death.
Ezekiel 18:20 The soul that sinneth, it shall die.
Romans 6:23 For the wages of sin is death;
At the end of the millennial reign there will be a second resurrection and final judgment. Sin and death will be eradicated and all who live on will possess the divine nature. God will live in and with his people.
Paul explains what is to happen:
1 Corinthians 15:20-28 But now is Christ risen from the dead, and become the firstfruits of them that slept. 21 For since by man came death, by man came also the resurrection of the dead. 22 For as in Adam all die, even so in Christ shall all be made alive. 23 But every man in his own order: Christ the firstfruits; afterward they that are Christ’s at his coming. 24 Then cometh the end, when he shall have delivered up the kingdom to God, even the Father; when he shall have put down all rule and all authority and power. 25 For he must reign (the millennial reign), till he hath put all enemies under his feet. 26 The last enemy that shall be destroyed is death. 27 For he hath put all things under his feet. But when he saith all things are put under him, it is manifest that he is excepted, which did put all things under him. 28 And when all things shall be subdued unto him, then shall the Son also himself be subject unto him that put all things under him, that God may be all in all.
This will be the fulfilment of God’s purpose.
Numbers 14:21 But as truly as I live, all the earth shall be filled with the glory of the LORD.
It is described in Revelation:
Revelation 21:3-7 And I heard a great voice out of heaven saying, Behold, the tabernacle of God is with men, and he will dwell with them, and they shall be his people, and God himself shall be with them, and be their God. 4 And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away. 5 And he that sat upon the throne said, Behold, I make all things new. And he said unto me, Write: for these words are true and faithful. 6 And he said unto me, It is done. I am Alpha and Omega, the beginning and the end. I will give unto him that is athirst of the fountain of the water of life freely. 7 He that overcometh shall inherit all things; and I will be his God, and he shall be my son.
Eternal life is not something we already possess; it is a gift which will be given to the faithful at the return of Christ and the resurrection of the dead.
May I suggest that you read:
After Death - What? (Please click on the title)
Heaven and Hell (Please click on the title)
I hope you find this helpful.