Level 88
Jeffrey created this series, but it's pretty old: https://laracasts.com/series/incremental-api-development
The part that is not covered in those series is the API resource class, you can find a video about that here: https://laracasts.com/series/whats-new-in-laravel-5-5/episodes/20
Otherwise, the documentation also has some good examples: https://laravel.com/docs/5.8/eloquent-resources