1. Create a `StatefulWidget` to host the form.
2. Instantiate a `GlobalKey<FormState>` in the `State` class.
3. Return a `Form` widget in the `build` method and assign the `GlobalKey` to its `key` property.
4. Add `TextFormField` widgets as children of the `Form` widget.
5. Implement a `validator` function for each `TextFormField` to validate user input.
6. Add a submit button (e.g., `ElevatedButton`) to trigger form validation.
7. Implement the validation check in the button's `onPressed` callback using `_formKey.currentState!.validate()`.
8. Handle form submission if validation is successful.