Aliens have come and kidnapped the first human they came across, unfortunately, that was you. They take you to a new planet almost identical to our current Earth, but without anything man-made.
The aliens say you can have 1 million real humans to start “New Earth” and you can put them anywhere and teach them anything you want. You’ll have 1,000 years to make a good New Earth and if the Aliens like it, you’ll get to keep it, if not they will blow it up and try again with someone else. You will have access to old Earths internet so you will have the choice on what technologies you introduce and when. You live in the ship, but you can choose to pop in and out of New Earth as you please. You will not be burdened with all 1 million humans at once. You can choose to add a small number of them at a time until you get the proper resources established.
Edit: The humans can reproduce, and will unless you implement some form of birth control to prevent them from doing so. Also the first 1 million humans will start with the basic knowledge of how to human and you can pick personality traits for them, like you would a Sim, but the babies they make are blank slates.
You don’t have to try and make it a good society, you can choose to watch the world burn for 1,000 years. Up to you.
I think this is the part I would become obsessed with; trying to figure out what the Aliens actually want. I’m confident that at our current technological level, we could automate a society that supports a million people. I’d start with accomplishing that, and then spend the rest of the time trying to develop a perfect piece of performance art including all million members to try and please the Aliens.
Your humans can procreate so in 1,000 years there will at least a few 100 million, provided you don’t wipe them out with a flood or whatever.