Since I haven't learned Docker yet, except for the Docker part, it was a good lecture because I could listen to it comfortably at a solid point. I know TDD is important, and I also know that tests are important, but I feel like it's vague and I'm like, "What should I do?" If you watch this lecture and learn how to use it, I think it will definitely lower the entry barrier for you to try it. There won't be many cases where you can apply it in earnest within the company, but I think you should take the time to internalize what you've learned by trying it out on your own projects.