How to create a learning app?

Question

Android

Hello. There was a task to create a simple "interactive learning application" in the shortest possible time, I hope I called it correctly) I must say right away that the application is not for the general public, purely for its own. So, the user launches the application, he is offered forms to choose from. He chooses a form, and training begins. Step by step, from top to bottom, each field is described, the user navigates through the fields by pressing, for example, the "Next" button. I’ll write the application, but I don’t know how best to implement the training itself.