It could cover all the basics but also feature case-studies of real-world examples of solving problems, so there could be a sort of knowledge base too that would attract seekers and lead them into the foundational content.
10 or 15 years ago, I remember being able to find detailed problem solving information on Google. Today the search results are a morass of affiliate and SEO content multiplied by plagiarism served from a mountainous dung heap of user-generated blather.