salaam Hope,
She said; how can I indeed have a son when no man has ever touched me and I have never been unchaste. He said; thus says your Lord, it is easy for Me and We will make him a sign for the people and a mercy from Us. And this matter is preordained. She thus carried him ..... [19:20-22].
My understanding .... Mary conceived Jesus, without any man touching her (i.e., by parthenogenesis). How could Mary have a son when no man touched her and she had never been unchaste? Because it is easy for God.
And We said to Adam, dwell in paradise <الْجَنَّةَ>, you and your wife and eat from it whatever you desire, however, do not approach this tree, lest both of you become transgressors.
However, Satan duped the two of them and caused their eviction from where they were, and We said; go down as enemies of one another, and the land <الأرْضِ> shall be your abode and sustenance for awhile.
Subsequently, Adam received from his Lord words by which He accepted his repentance. Indeed, He is The Accepter of Repentance, The All Merciful.
We said, go down from here all of you. Then when you receive guidance from Me, whoever follows My guidance has nothing to fear nor will he grieve.
[2:35-38]
My understanding ... paradise ( الْجَنَّةَ) where we lived before, was not in the land where we live now (الأرْضِ). Because God sent Adam and his wife, and the rest of us from الْجَنَّةَ to الأرْضِ after the event discussed in 2:35, so الْجَنَّةَ could not already have been in الأرْضِ. I believe it is outside our current universe, like the paradise in the hereafter, and the paradise of abode near where Muhammad was transported to during his night journey (53:15).
Another reason is that all of us were in الْجَنَّةَ too. Surely, we (the present generation) were not in a garden in Africa. So do we know where it was or what particular tree it was? From 3:7, I am wary of seeking an interpretation (تَأْوِيلِ) that is not already evident. The message that can be drawn from the event of the tree is that we should not disobey God, and we should follow His Guidance and commandments. And also, if we repent and turn to God, our repentance will be accepted, like Adam was forgiven.