Turn Roll a Ball into AR game

Hey There,
I am new to the Unity world, and I have just finished the Roll a Ball tutorial to get a better grip on the interface and basic functions.

I wanted to know how it is then possible to use this platform and export it as an AR game to an Android smartphone (Galaxy S8 in particular). I downloaded ARCore but I need some help with figuring out how t export it as AR.

Thank you all,
Dan