I also strongly suggest you learn how Moose and Moo work. They bring a sane object system into the Perl land and have some very, very good developers working on them.

Moo/Moose later :)

I think its better to first learn why/when/what/whichway ... and only later deal with mechanics/implementation/how-details like moo/moose/badger...bless

To wit http://www.developer.com/author/Matt-Weisfeld-81520.htm / https://en.wikiversity.org/wiki/Object_Oriented_Software_Design#Introductory_Articles

• The Object-Oriented Thought Process
• Moving from Procedural to Object-Oriented Development
• Object Relationships
• Thinking in Objects
• Furthering the Object-Oriented Mindset
• Exploring Encapsulation
• Hiding Data within Object-Oriented Programming
• Protecting Data through Object Oriented Programming
• Putting an Object in a Safe State
• The Components of a Class
• The Evolution of Object-Oriented Languages
• Object Responsibility
• Object Construction
• Inside Constructors
• Encapsulation vs. Inheritance
• Packaging Objects to Preserve Encapsulation
• Object Signatures
• Object Serialization
• Connecting to a Database with JDBC
• Using More Advanced JDBC Features
• Serializing an Object via a Client/Server Connection
• Objects and Client/Server Connections
• Primitives and Object Wrappers
• Objects and Collections
• Objects and Collections: Vectors
• Objects and Collections: ArrayLists
• Objects and Interfaces
• Designing with Interfaces and Abstract Classes

Building Skills in Object-Oriented Design — S.Lott Building Skills in Object-Oriented Design — Step-by-Step Construction of A Complete Application — Roulette / Craps / Blackjack / Testing

Why yes, this is just an opportunity to link some new-to-me stuff I found :)