I’m coming back to Drupal after more than a decade away. I’m an experienced PHP programmer, but don’t remember really anything about Drupal and besides it’s probably changed a ton since I last worked with it.

I’m looking for learning resources, books, videos, documentation that will help me deeply learn Drupal as an engineer, not just a content manager.

I started with the official documentation, but it seems pretty disorganized and not a clear path on where to start.

I’m open to free or paid content so long as it’s high quality.