<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> Hi Ignacio, My advice, in order of importance. <ul> <li>You learn a lot by doing things. So pick up a subject of interest for you, may be related to financial topics, and build from scratch an application from there. You may not need to develop a GUI and stay focused on the domain model. After all Smalltlak already provides a GUI to play with your object, mainly with the inspector and debugger. </li> <li>Don't be afraid to make mistakes. You will make mistakes, a lot, learn from it, and you will refactor your code a lot too.</li> <li>Regarding OOP, only one and easy to follow advice, always think in term of responsibilities: this characteristic (instance variable) or this behavior (method) to which entities (class) does it belongs to</li> </ul> Hilaire <div class="moz-cite-prefix">Le 07/07/2024 à 14:51, Ignacio Sniechowski via Cuis-dev a écrit : </div> <blockquote type="cite" cite="mid:CAMCzT-ZGHSxoajTH6n__taLoCsoWxXY8vU1tJTFpEjFbca0WyA@mail.gmail.com">I've tried to focus on thinking in objects. But I still have the feeling that I am missing a lot.</blockquote> </body> </html>