Ark: Survival Evolved- DLC map downloads?

I got an Ark: Survival Evolved disc and downloaded it on my Xbox one. When I go to play it, I press "Join Ark" in the menu of the game and it says I don't have the content that's required to play downloaded. I tried to install the DLC maps from the Microsoft store, but there's only Ascended maps which I can't play. Are there any free ones? How do I get them? And even if they're not free, how do I get them?