ABAP OO - Need an ABAP OOP Tutor (Interfaces & Method Calls)

I am currently learning ABAP Objects (ABAP OO) and am looking for a tutor to help me better understand object-oriented concepts, especially interfaces, implementing interfaces, and calling methods through interface references. I have a basic understanding of ABAP, but I would like guidance on: Creating and implementing interfaces Interface references and object references Calling methods via interfaces Polymorphism and dynamic behavior Casting and type compatibility Real-world ABAP OO examples and best practices Debugging and understanding existing ABAP OO code My goal is to gain confidence in reading, writing, and troubleshooting ABAP OO code in professional SAP environments. I prefer hands-on examples and practical exercises to reinforce the concepts. If you have experience with ABAP OO development and teaching, I would appreciate your help.