I'm going to try something different, take it like an exercise where you can debate. I will state a bunch of things and you tell me where things are wrong, if at all:
Before the arrival of humans, God and Lucifer had some difference, and Lucifer apparently took a third of the angels with him ( Revelation 12:4 ) in rebel and was cast to the Earth. In the garden, he temped Eve. Earth, not hell, is his kingdom and at the end, he gets cast into a lake of fire burning with God's wrath as punishment ( Revelation 20:10 ). Then there is a new heaven and a new Earth.
I think you have the timeline a bit muddled....
The Bible tells us that satan was a "covering cherub" in the garden of Eden.....
Ezekiel 28:12-17....
“You were the model of perfection,
Full of wisdom and perfect in beauty.
13 You were in Eʹden, the garden of God.
You were adorned with every precious stone. . . .
They were prepared on the day you were created.
14 I assigned you as the anointed covering cherub.
You were on the holy mountain of God, and you walked about among fiery stones.
15 You were faultless in your ways from the day you were created
Until unrighteousness was found in you. . . .
17 Your heart became haughty because of your beauty.
You corrupted your wisdom because of your own glorious splendor."
This was a position of trust and responsibility in God's heavenly organization. Being there in the garden, observing what was going on, this once faithful angel began to entertain ambitions that were out of line with his station as a guardian... a servant of his God. It was a treasonous shift in his loyalties. He wanted what the humans were giving to God.....their worship.
He observed everything carefully and devised a plan to separate the humans from God....it was the only way he could then become a replacement god for them. He tempted the woman in order to get to the man....forcing him to divide his loyalties and he chose to join his disobedient wife rather than to obey his God.
Being cast down to the earth came later even though satan had full access to both heaven and earth in the interim. God was allowing him to prove himself to be the better choice of god and ruler for the human race.
Revelation 12 is a description of what was to occur at the time of the end. The time for Jesus to return and to establish his Kingdom over the earth. It was a time that was described by the prophet Daniel about 500 years before Jesus was born as a human. (Daniel 7:13-14) This was the time for Christ to become King and his first act as ruling monarch was to evict satan and his hordes from heaven.
Revelation 12:7-12....
"And war broke out in heaven: Miʹcha·el and his angels battled with the dragon, and the dragon and its angels battled 8 but they did not prevail, nor was a place found for them any longer in heaven. 9 So down the great dragon was hurled, the original serpent, the one called Devil and Satan, who is misleading the entire inhabited earth; he was hurled down to the earth, and his angels were hurled down with him. 10 I heard a loud voice in heaven say:
“Now have come to pass the salvation and the power and the Kingdom of our God and the authority of his Christ, because the accuser of our brothers has been hurled down, who accuses them day and night before our God! 11 And they conquered him because of the blood of the Lamb and because of the word of their witnessing, and they did not love their souls even in the face of death. 12 On this account be glad, you heavens and you who reside in them! Woe for the earth and for the sea, because the Devil has come down to you, having great anger, knowing that he has a short period of time.”
That "short period of time" is 'short' from God's point of view, but not man's. We have a series of world events in Matthew 24 as well as Daniel's prophesy to make some calculations about when "the time of the end" would actually be. Daniel places the time of the end in the rulership of the present world rulers, and the series of world events was to begin with unprecedented warfare. I believe that began in 1914 with the outbreak of the First World War and satan and his hordes have to continued to intensify their efforts ever since. But the devil's short period of time is almost up.
When he returns to judge the world, Jesus will hurl the devil and his demons into an abyss of inactivity, for 1,000 years whilst the Earth's new rulers repair all the damage done to the earth under satan's influence, (Revelation 11:18) and brings the redeemed human race back to their original condition, as they were at the beginning. (Revelation 21:2-4) Earth will then become man's permanent home and all will return to God's original purpose. (Isaiah 55:11)
At the end of the 1,000 years, humanity will receive one last test as the devil is released from his prison. (Revelation 20:1-3) Those who pass this test will inherit everlasting life in paradise conditions on earth, whilst those who fail, will join satan in the lake of fire....the fire is not literal, but a symbol of everlasting destruction in "gehenna". (Matthew 10:28) Those who go into the lake of fire will never be seen again...nor will we remember them or their horrible deeds. (Isaiah 65:17) There is no hell of eternal torment...just eternal death.
That is how I understand the Bible's message...