See these 4 episodes to get a brief idea how flutter works. See it on 1.7x , though these are small videos
- How to Create Stateless Widgets - Flutter Widgets 101 Ep. 1
- How Stateful Widgets Are Used Best - Flutter Widgets 101 Ep. 2
- Inherited Widgets Explained - Flutter Widgets 101 Ep. 3
- When to Use Keys - Flutter Widgets 101 Ep. 4