Learn to use ChatGPT in ChatGPT and Codex in Codex through a short, practical two-exercise route suited to the app you are using. Try curso.ai in your preferred language. English and Spanish exercises are included, and the model can translate them into other languages. Ask questions, experiment, and continue in the same conversation with a simple progress map and informal feedback. No registration or external service is required. The plugin does not save your progress or issue certificates.