How to enter Realtime Database data into my Flutter app

Question

I’m a beginner in Flutter and I’m wondering how to work with the Realtime Database in a project I’m part of, I wanted to know how to take this data from the image of the database and put in the cards of the image of my app.

App initial test code:

import 'package:flutter/material.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  Firebase.initializeApp();
  runApp(const MyApp());
}

/// This is the main application widget.
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  static const String _title = 'Smartfuse';

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      title: _title,
      home: MyStatefulWidget(),
    );
  }
}

/// This is the stateful widget that the main application instantiates.
class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({Key? key}) : super(key: key);

  @override
  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}

/// This is the private State class that goes with MyStatefulWidget.
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Testes"),
      ),
      body: Column(
        children: [
          Container(
            height: MediaQuery.of(context).size.height * .25,
            width: MediaQuery.of(context).size.width * .55,
            child: Card(
              child: ListTile(
                title: Text("Filme de Ação"),
              ),
              elevation: 8,
              margin: EdgeInsets.all(20),
            ),
          ),
          Container(
            height: MediaQuery.of(context).size.height * .25,
            width: MediaQuery.of(context).size.width * .55,
            child: Card(
              child: ListTile(
                title: Text("Filmes de Terror"),
              ),
              elevation: 8,
              margin: EdgeInsets.all(20),
            ),
          ),
          Container(
            height: MediaQuery.of(context).size.height * .25,
            width: MediaQuery.of(context).size.width * .55,
            child: Card(
              child: ListTile(
                title: Text("Filmes de comédia"),
              ),
              elevation: 8,
              margin: EdgeInsets.all(20),
            ),
          ),
        ],
      ),
    );
  }
}

The image of the database:

Application Cards: