The Dart language is good for learning slowly. If you have prior language knowledge, you can learn it without difficulty. It's good because there are many practice problems.

I believe this is the best course for beginners who are trying to learn programming for the first time with Dart, unlike those developers who already have prior knowledge. Of course, there are many free lectures on YouTube, but most of these lectures introduce the Dart language to developers in a compressed concept lecture format, which is too dense for beginners. Personally, I think the easiest way for beginners to learn the concepts is by solving practice problems like this.

This is a very, very good lecture. You can see better learning effects through practice.

You will learn the basics of Dart usage through variable function classes, and it seems like a good idea to learn before using Flutter.