The Complete Dart Language Guide for Beginners and Beyond

I agree with this. A few signs that you are becoming a more advanced developer are t

1. you are using CMD + Click on classes / widgets to look at how they are built to see how they are used
2. Using official docs from flutter instead of "hacking it until it looks right"
3. Relying less on stack overflow for general tips and advice / beginner questions because you know your way around the official docs really well
4. Are answering a lot of Stack Overflow questions and linking to docs / creating examples
5. (Learning how to get good at reading the docs is an underrated skill, and can be very hard for newbies used to just copy / paste examples. Docs require some deeper understanding and make assumptions you know underlying stuff).

I would also recommend, in addition to flutter architecture overview, taking a full DART developer course, and learning all facets of the language to build more robust widgets and classes. Some of the things newbies miss out on are:

1. Abstract classes
2. Interfaces
3. Mixing and extensions
4. Factory constructors
5. Error handling and exceptions
6. Streams
7. Testing types

And for code organization, I would recommend researching different software architecture patterns to help avoid a spaghetti dumpster of code.

Yes, start with a good Dart course like https://www.udemy.com/course/complete-dart-guide/ Then any of the multiple Flutter courses. But if you have no coding experience start with that course on dart

This one of the best Dart course complete dart guide with Andrea Bizzotto. Everything you need.

Follow the official documentation

https://www.udemy.com/course/dart-from-novice-to-expert/

https://www.udemy.com/course/complete-dart-guide/

Also you can check there YouTube channel

I would suggest to start with Dart and then flutter. There is a new course from Andreas bizzotto and right now its priced at 9.99€ https://www.udemy.com/course/complete-dart-guide/?password=nnbd&couponCode=LAUNCH10