The UXDL Honeycomb starts by asking how to create valuable learning experiences with content. Why start here? Because content is time-consuming and expensive to produce. And, well-designed content can significantly facilitate learning.
Each cell in the honeycomb surfaces evidence-based principles that will help you create content that is useful, desirable, accessible, credible, and intuitive (findable & usable).
A good starting place is to explore how to make content useful for learning.