This looks like a pretty decent tutorial for it's target audience. However, as someone who works with Unity on AR and VR the biggest bit of advice I can give is learn how Unity WANTS you to work with it! Currently we are re-writing an AR/VR test suite because the original version was written by programmers with little or no Unity experience. This means they re-wrote scene loading, cameras, and other parts that were already in Unity (or no one re-factored when it was added/updated!). I highly suggest catching the Udemy Unity Certified Developer course on a sale. It will give you an overview of all the parts of Unity that you might not touch. But it will also get you used to Unity's workflow. (https://www.udemy.com/unitycert/)