What helped you understand connected devices faster?

I recently started learning about connected devices in my IoT course, but I still struggle with many of the basic ideas. While looking for study materials, I came across internet of Things homework help online, but I want resources that explain everything in simple language. Did you learn more from videos, books, or small practice projects? Which beginner-friendly resource made the biggest difference for you? I would love to hear your recommendations because I want to understand the concepts instead of just memorizing them.