Yes, God's plan for humanity is stated in the opening chapters of Genesis. He was created in the image and likeness of God, who provided absolutely everything needed for perfect life in the garden of Eden. The man, Adam, was placed in that garden and told to cultivate (horticulture), and to name the animals God brought before him (zoology). A woman was created for him as companion and helper, and the couple were told to multiply, to fill (not over-fill) the earth (procreation) and to subdue it, having all the other creatures God had created in dominion (responsibility).
Details then emerge when God told them of having provided (in the midst of the garden) - the Tree of Life. This need not be taken a a literal tree, with literal edible fruit, for no literal tree or its fruit can impart that particular life God was indicating - life that would never end. This becomes clear as the account unfolds with another symbolic tree - the Tree of the Knowledge of Good and Evil. It, likewise, cannot be taken as a literal tree with literal fruit, as no tree can give any knowledge, let alone that particular knowledge.
This was when God warned of not partaking of the Tree of the Knowledge of Good and Evil. (Why do most people abbreviate that to merely 'the Tree of Knowledge'?) To do that would result in death, God warned.
So, there we have God's original purpose, with only one, single, stipulation as to what not to do with one particular matter. To obey would ensure life everlasting (at what point we are not told - clearly, to disobey on that matter would be to forfeit eternal life in that paradise.) The fact that, once the first couple had disobeyed, they had to be cast out of the garden into a hostile world beyond, to die, and God placed cherubim at the east of Eden, to prevent the couple getting back in to partake of the Tree of Life, shows that humanity had wrecked matters. And not only for themselves and all humanity that would be born from them, but all the animal and earthly creation would consequently suffer too.
Yet the last book of the Bible, Revelation, presents us with the Tree of Life again. It remains in God's control and, at the right time, will be experienced. Inbetween the 'bookends' of Genesis and Revelation, we learn of God's continued dealings with disobedient humanity, how he deals with them in righteousness, justice and mercy, so that all things will yet be brought back to God's initial plan of perfection and peace. So - there is hope! And that hope is realised in how Jesus fulfills the promise of God in Genesis 3:15. Too much to go into here, but it's all there, starting with Genesis, and going through to "a new heaven and the new earth, for the first heaven and the first earth were passed away; and there was no more sea." Revelation 21:1. Awesome, is it not?
Just to add (responding to a secondary question), that it is not humanity's obedience that secures any of us access to the Tree of Life, as if we had any right to it in the first place. Humanity is disobedient - every first and last one of us - and our iniquities (unrighteousness) can only incur the righteous wrath of God (read the first eight chapters of Romans for that, please.) Only what the Son of God did in fulfilling the plan of redemption first set out in Genesis 3:15 secured that for those who put total faith in the finished work of Christ on the cross.
This is an answer from one who may be categorised as a Bible-believing, God and Christ-honouring, Protestant Christian. (In case the question needs to be directed to any particular group.)