Wanting player to star a new world with

I will also be making a enderman xp farm for all of to use also

Survival mode would be kind of hard to build a massive city in. If you are doing it in creative mode I could build a building or two.

In Minecraft, the world is saved to the account that is "Player 1" and starts the game first.

When the second player joins that world, he is saved together with the world in Player 1's save slot.

If the second player starts the game themselves, they start a new game with a new world and empty inventory, as they have no access to Player 1's savegame. To prevent that, make sure that Player 1 starts Minecraft and enters their world, and that Player
2 then joins that session.

If you want the two players to be able to play independently on the same world, you would need to rent (and pay for) a Realm that is hosted on Minecraft's online service.

I want to finish Star Wars Jedi: Fallen Order, The Outer Worlds and the Modern Warfare campaign.

People are saying that there is already Fallout 3, and Fallout New Vegas that fit this description of a future open world sci-fi world.

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But Bethesda could have said that the game is set in recent of present times and we wouldn't know any the wiser.

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I want it to be something like the setting of Halo, Mass Effect, Star Wars 1313