Ask HN: How do I find a mentor for iOS development?

I have been developing apps for years now, but at a very basic level. As I look towards becoming a better developer, I am getting into more complex iOS apps that require asynchronous functionality and local storage. While, these concepts are not terrible to understand on their own, I struggle with finding the best practices among the polluted search results.

Essentially what I am looking for is a mentor in iOS development, particularly Swift. Do you know any forums, groups, or have any other resources that might be useful for some of the questions I have? Questions that might be outside the realm of StackOverflow.

Example questions: 1) How should I go about updating a tableView with data that is the result of an async request? 2) What is the best way to structure a system so that I can check for differences/changes between locally stored data and remote data? How should I do about updating the data?