When God created first human (Adam) and his woman then God chose garden of Eden to be the place where humans were supposed to live forever. God didn't ask them to work there for a living but Garden of Eden provided a habitat with all of its natural food. But then after humans disobeyed God then there was a threat to peace and harmony of the garden of Eden. Humans had to descend on earth and prove that they can live in the garden of Eden in peace. To check humans God created the earth like a paradise, full of nature, with different living beings living in it (just like Garden Of Eden).
God says in the Quran:
[30:30] "No change in creation of God, that is the correct religion but most people do not know"
[6:38] "And there is no creature on the earth or bird that flies with its wings except [that they are] communities like you. We have not neglected in the Register a thing. Then unto their Lord they will be gathered."
[67:2] "He (God) created death and life that He may test you, to see which of you is the best in deeds."
6:165 "And He it is Who has made you vicegerent in the land and raised some of you above others by (various) grades, that He might try you by what He has given you; surely your Lord is quick to requite (evil), and He is most surely the Forgiving, the Merciful."
4:117-120 [For] they call upon instead of Him none but female [gods], and they [actually] call upon none but a rebellious Satan, whom God has cursed. For he had said, "I will surely take from among Your servants a specific portion. And I will mislead them, and I will arouse in them desires, and I will command them so they will slit the ears of cattle, and I will command them so they will change the creation of God." And whoever takes Satan as an ally instead of God has certainly sustained a clear loss. Satan promises them and arouses desire in them. But Satan does not promise them except delusion.
As many humans have followed satan and corrupted God's creation then I think the best work to do would be to restore God's created natural earth and as a vicegerent or representative of God on earth, our work is to make sure everything stays right. Stop transgressors who destroy and inflict sufferings on God's creation. For example working against hatred and wars between humans, deforestation, animal testings in labs, genetically modifying living organisms etc. Working for a world where life is balanced with peace and harmony and a place where all living beings have right to live in their habitat is what I mean. Those who will prove themselves in this temporary word meant for a test, I think they deserve to live in the garden of Eden which is full of peace and harmony and people who seek corruption have no place in that garden.