Together with the documentation, a Phalcon 2 sample application would be in order, even if it's opinionated.
Something that offer a good start
- ACL
- CRUD
- User and Admin modules
- Cache
- Pagination
- more..?
Phalcon 2 will work as Phalcon 1.x, current tutorials/samples will work for you in one version or another:
- INVO (Acl, Pagination, CRUD): https://github.com/phalcon/invo
- Vokuro (User and Admin modules, Security, Forms, Validation): https://github.com/phalcon/vokuro
- Phosphorum (Cache, Pagination, ORM, Relationships, Ajax, Integration with Third-Party services): https://github.com/phalcon/forum
More samples: https://docs.phalcon.io/en/2.0.0/reference/samples.html