Help with SQLite for Android Errors in Unity3D?

Hi guys! I am trying to adapt a script to work with SQLite4Unity3D but I am struggling with 3 errors. I was wondering if anyone could help. Here is the script. I have adapted it as far as I could:

  using UnityEngine;
  using SQLite4Unity3d;
  using System;
  
  public class QuizStart : MonoBehaviour
  {
  
      private SQLiteConnection connection;
      private int[] rowIndices;
      private int questionIndex;
  
  
      void Start()
      {
          // Initialization
          string connectionString = "URI=file:" + Application.dataPath + "/quizz.db";
          connection = (SQLiteConnection)new SQLiteConnection(connectionString);
          connection.Open();
  
          InitializeQuestions();
  
          // Execute GetNextQuestion when you need to access the next question
          GetNextQuestion();
      }
  
      void OnDestroy()
      {
          connection.Close();
      }
  
      private void InitializeQuestions()
      {
          // Retrieve amount of questions
          SQLiteCommand cmd = connection.CreateCommand();
          cmd.CommandText = "SELECT COUNT(*) FROM english";
          var count = (Int64)cmd.ExecuteScalar();
  
          // Generate a shuffled array of question indices.
          rowIndices = new int[count];
          for (int i = 0; i < count; i++)
              rowIndices[i] = i;
          Shuffle(rowIndices);
      }
  
      public void GetNextQuestion()
      {
          // Read question from database. Do note that you'll have to use your own columns here.
          SQLiteCommand dbcmd = connection.CreateCommand();
          string sqlQuery = string.Format("SELECT * " + "FROM english LIMIT 1 OFFSET {0}", rowIndices[questionIndex]);
          dbcmd.CommandText = sqlQuery;
          using (IDataReader reader = dbcmd.ExecuteReader())
          {
              reader.Read();
              string question = reader.GetString(1);
              Debug.Log("question: " + question);
              reader.Close();
          }
  
          questionIndex++;
          if (questionIndex > rowIndices.Length)
              questionIndex = 0;
      }
  
      private static void Shuffle<T>(T[] array)
      {
          var rnd = new System.Random();
          int n = array.Length;
          while (n > 1)
          {
              int k = rnd.Next(n--);
              T temp = array[n];
              array[n] = array[k];
              array[k] = temp;
          }
      }
  }

My 3 errors are with : CreateCommand() ll. 34 and 47/ ExecuteScalar l. 36/ IDataReader l. 51

Thanks for any help! :)