Where to find high-quality software development learning resources?

I want to have a couple of go-to places to search for when I want to learn a new technology (from anything like a new programming language to something specific like Authentication/ Authorization). Most things I can find via search engines are either outdated, inconsistent, aimed at complete beginners, unnecessarily verbose, hand-wavy, or all of the above.

Where do you look for for high-quality in-depth learning materials for development related things? It can be in any format/ medium - courses/ video/ interactive tutorials/ articles/ books etc.