Conversation Bubbles and starting it

Hello I'm trying to make a 2D rpg game and I did some coding on it to make the dialogues/boxes come out from the screen(animation) and you can click on a button to just keep reading the dialogues. And when it finishes goes out, the t$$anonymous$$ng is that I need to click a button to start the dialogue, how can I make it start with a simple click or just whenever you load in the scene just starts the dialogue?

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 using TMPro;
 public class DialogueManager : MonoBehaviour
 {
     public TextMeshProUGUI speakerName, dialogue, naviButtonText;
     public Image speakerSprite;
 
     private int currentIndex;
     private Conversation currentConvo;
     private static DialogueManager instance;
     private Animator anim;
     private Coroutine typing;   
 
     private void Awake()
     {
         if(instance == null)
         {
             instance = t$$anonymous$$s;
             anim = GetComponent<Animator>();
         }
         else
         {
             Destroy(gameObject);
         }
     }
 
     public static void StartConversation(Conversation convo)
     {
         instance.anim.SetBool("isOpen", true);
         instance.currentIndex = 0;
         instance.currentConvo = convo;
         instance.speakerName.text = "";
         instance.dialogue.text = "";
         instance.naviButtonText.text = "";
 
         instance.ReadNext();
     }
 
     public void ReadNext()
     {
         if(currentIndex > currentConvo.GetLength())
         {
             instance.anim.SetBool("isOpen", false);
             return;
         }
 
         speakerName.text = currentConvo.GetLineByIndex(currentIndex).speaker.GetName();
 
         if(typing == null)
         {
            typing = instance.StartCoroutine(TypeText(currentConvo.GetLineByIndex(currentIndex).dialogue));
         }
         else
         {
             instance.StopCoroutine(typing);
             typing = null;
             typing = instance.StartCoroutine(TypeText(currentConvo.GetLineByIndex(currentIndex).dialogue));
         }
 
         
         speakerSprite.sprite = currentConvo.GetLineByIndex(currentIndex).speaker.GetSprite();
         currentIndex++;
 
         if(currentIndex >= currentConvo.GetLength() + 1)
         {
             naviButtonText.text = "";
         }
     }
 
     private IEnumerator TypeText(string text)
     {
         dialogue.text = "";
         bool complete = false;
         int index = 0;
 
         w$$anonymous$$le (!complete)
         {
             dialogue.text += text[index];
             index++;
             yield return new WaitForSeconds(0.02f);
 
             if(index == text.Length)
             {
                 complete = true;
             }
         }
 
         typing = null;
        
     }
 }

And t$$anonymous$$s is the code for the test button

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 using UnityEngine.UI;
 
 public class Tester : MonoBehaviour
 {
     Button buttonToHide;
 
     public Conversation convo;
 
     void Start()
     {
         Invoke("OpenDialogue", 5);
 
         buttonToHide = GetComponent<Button>();
         buttonToHide.onClick.AddListener(() => HideButton());
 
     }
     public void StartConvo()
     {      
         DialogueManager.StartConversation(convo);
        
     }
 
     void HideButton()
     {
         buttonToHide.gameObject.SetActive(false);
     }
 }

Thanks!