You contradict what God has written:
Genesis 5
3 And Adam lived an hundred and thirty years, and begat a son in his own likeness, after his image; and called his name Seth:
4 And the days of Adam after he had begotten Seth were eight hundred years: and he begat sons and daughters:
5 And all the days that Adam lived were nine hundred and thirty years: and he died.
ALL THE DAYS THAT ADAM LIVED WERE NINE HUNDRED THIRTY YEARS. To confirm it, 800 plus 130 = 930 years: what part of that is hard to understand?
Nice try but there is no reference point. Either Adam lived 930 years outside the garden or he lived 930 years From his creation.
Adam was not born of a mother so he had a navel?
When he was in the Garden, he was immortal, yet he counted years?
After immortality, there is one reason to count time and that reason is an awareness of death.
The truth is no one knows how long the Garden existed, there is no way to estimate the age of the earth from the years people lived. There are however insightful references to firmaments and light.