It’d take you approximately two weeks to get through it (or two days if you’re really passionate about Flutter). You’ll come out with a much better understanding of how Flutter works and the best practices for coding Flutter apps.
Read moreHow do I get better at fluttering?
Flutter internals The best way to learn is by reading the source code . Start with your favorite widget and read all the documentation comments in the source file. Then follow a link to another source file and keep reading. The more you do this, the more familiar you’ll get with how Flutter works internally.
Read more