For understanding single-phase and three-phase transformers, concise resources are recommended, including Wikipedia and HyperPhysics for foundational concepts. The discussion emphasizes the importance of grasping magnetics before diving into transformer specifics. Seeking shortcuts often leads to more work, suggesting a thorough approach is preferable. Various online resources and forums are available for deeper insights, tailored to individual learning habits. Engaging with diverse materials can foster a better intuitive understanding of electrical concepts.