It's difficult for beginners. And the lecture itself is not smooth. As a web developer, I only know the concept of blockchain and took the course to understand smart contracts to some extent, but I stopped the lecture near the environment setting lecture. The lecture time is long, but the content is not smooth. And this is a personal complaint, but the voice volume is low, so when I turn up the volume, the typing sound during the lecture hits my ears. The instructor may not have intended it, but he often coughed in vain, which made it a little uncomfortable to listen to. I will stop the lecture for now and take the Budongsam Dapp next to me.