Hello @NhatNM and welcome to the world of Phaser!
In fact, in contrast to Phaser 2, there are currently less available learning resources (tutorials, videos, examples, etc.). But if you want to develop HTML5 games, Phaser 3 is the right framework and I would stick to it and don't use Phaser 2 (personal opinion). Daily new learning resources are being published and Phaser 3 is constantly being optimized.
Here are some resources to continue your journey with Phaser 3, if desired:
- https://github.com/photonstorm/phaser3-examples (official examples)
- https://github.com/digitsensitive/phaser3-typescript (game examples, cheatsheets, everything in TypeScript)
- https://photonstorm.github.io/phaser3-docs/index.html (online docs
Most importantly: Ask questions and do not stick around with a problem for days or weeks. We are also still learning to create games with Phaser 3!