No, you don't know what happened at the Fall of Man. You have been told false information about what "original sin" means.
God told Adam and Eve the day they disobeyed and ate the fruit, they would die. That day. Dead.
And yet they lived for centuries afterwards, having dozens of children. So did God lie? Empty threat? Change his mind? Get it wrong?
No. The day that Adam and Eve ate the fruit, two things happened. One, they gained the knowledge of good and evil. And two, they died. That very day.
The reason you do not know how they died is that you are also dead, and do not know it. You are physically alive, and have never considered the fact that you are spiritually dead. You have not the Breath of Life, the Holy Spirit of God, within you, as Adam and Eve did, before they sinned. Before they died.
And being spiritually dead, they could only make children in their spiritually dead image. had God done nothing, all of humanity would be born in Adam and Eve's spiritually dead image, and all of humanity would be condemned to death. And not just physical death, but spiritual death, what we call the second death, which is an eternity of punishment in a lake of fire, also known as Hell.
That's why people go to hell. They were born into a fallen and depraved race of beings who rebelled against God and lost, and joining the losing side, suffer the same fate as the leader of that rebellion, the fallen angel known as satan, or lucifer.
Get the notion of "apples" out of your head. The fruit they ate was unique, and has never again been seen by mankind. But you inherited their knowledge of good and evil, and you inherited the gospel of satan, which tells you to know good and evil, choose good, avoid evil, and thus be like God.
And in that manner, you damn yourself to what you deserve, as a member of a fallen class of spiritually dead losers in a war that rages about you, of which you are unfortunately unaware.