This post is a list of links you'll find on the natural Google searches. That's fine as a gateway drug, but you'll get more mileage out of frequenting one of the AR/VR subreddits or chats. For things in the early stages, plugging yourself into the community is more valuable than consuming the right news or tutorials.
Sounds like good advice. What are some of the AR/VR subreddits or chats you like?
Would people be interested in a subreddit where we can talk about ARKit stuff? It would be great to share projects and ideas of other developers building stuff with ARKit!