what must i do next?
What you might need to do with your app fare Project is build something similar to a Booking application. Here is Sajal's tutorial https://imagnity.com/tutorials/app-inventor/list-view-on-app-inventor/ . You might be able to do that.
Your present code does not have a way to save information entered.
- you can temporarily store information that is not persistant using a List (the information disappears when you close the app.
- you can save on your device using a TinyDB
- you can save on the Web using a CloudDB, FirebaseDB, or a Google Spreadsheet used as a database.