Why if I execute .SetText on the Start it dont works.

Hello, I want to execute in the Start of the script to set a text in to "texto", but when I execute it on Start dont works. If I use execute it on the Update it works but its no in the beginning, the update will send the messages 60frames x sec.

 using System.Collections;
 using System.Collections.Generic;
 using TMPro;
 using UnityEngine;
 
 public class ShowZenis : MonoBehaviour
 {
     // Start is called before the first frame update
 
     private ZeniManager zm;
     public TextMeshProUGUI texto;
     public int dinero;
     void Awake()
     {
             zm = gameObject.AddComponent<ZeniManager>(); //Instanciamos un nuevo objeto, en MonoBehaviour se instancian así.
             texto = (GameObject.Find("Monedas").GetComponent<TextMeshProUGUI>());
     }
     // Update es llamado una vez por cada frame.
     void Start(){
 
             dinero = zm.getZenis();
             texto.SetText("" + dinero);
     }
     public void OnClickIt() {
 
         if(gameObject.name == "ButtonAdd") {
 
             zm.addMoney(40);
             dinero = zm.getZenis();
             texto.SetText("" + dinero);
             //PlayerPrefs.DeleteAll();
         }
     }
 }
 

IF I USE START:

 using System.Collections;
 using System.Collections.Generic;
 using TMPro;
 using UnityEngine;
 
 public class ShowZenis : MonoBehaviour
 {
     // Start is called before the first frame update
 
     private ZeniManager zm;
     public TextMeshProUGUI texto;
     public int dinero;
     void Awake()
     {
             zm = gameObject.AddComponent<ZeniManager>(); //Instanciamos un nuevo objeto, en MonoBehaviour se instancian así.
             texto = (GameObject.Find("Monedas").GetComponent<TextMeshProUGUI>());
     }
     // Update es llamado una vez por cada frame.
     void Update(){
 
             dinero = zm.getZenis();
             texto.SetText("" + dinero);
     }
     public void OnClickIt() {
 
         if(gameObject.name == "ButtonAdd") {
 
             zm.addMoney(40);
             dinero = zm.getZenis();
             texto.SetText("" + dinero);
             //PlayerPrefs.DeleteAll();
         }
     }
 }

IF I USE UPDATE:

You will say me: use the Update, but the problem is when I use the Update I cant modify the text, like its forever don't know how to say it.

Thanks.