How to make a Saved/Favorites system in unity?

I have no idea where to start with t$$anonymous$$s or how to search for more info on t$$anonymous$$s topic so i am coming here for advice. I want to make a Saved system where the player can press a Button and get the Object to appear on a Favorite list(list of buttons that take you to the Game scene shown on them).

I have managed to make t$$anonymous$$s

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 using System;
 
 public class CustomSave : MonoBehaviour
 {
     public Button Custom;
     public Button Save;
     public Button Save1;
     int a = 0, b = 0;
     // Start is called before the first frame update
     void Start()
     {
 
     }
 
     // Update is called once per frame
     void Update()
     {
         if (a>b)
         {
             
 
             if (PlayerPrefs.GetInt("Place") == 1 && PlayerPrefs.GetInt("1") == 0)
             {
                 RectTransform rt = Custom.GetComponent<RectTransform>();
                 rt.anchoredPosition = new Vector2(-285, 435);
                 PlayerPrefs.SetInt("1", 1);
                 PlayerPrefs.SetInt("2", 0);
 
             }
             if (PlayerPrefs.GetInt("Place") == 2 && PlayerPrefs.GetInt("2") == 0)
             {
 
                 RectTransform rt = Custom.GetComponent<RectTransform>();
                 rt.anchoredPosition = new Vector2(245, 435);
                 PlayerPrefs.SetInt("2", 1);
             }
             if (PlayerPrefs.GetInt("0") == 0)
             {
                 RectTransform rt = Custom.GetComponent<RectTransform>();
                 rt.anchoredPosition = new Vector2(-2000, 700);
                 PlayerPrefs.SetInt("1", 0);
                 PlayerPrefs.SetInt("0", 1);
 
 
             }
             b++;
         }
 
     }
     public void CustomSaved()
     {
         a++;
         PlayerPrefs.SetInt("CustomSaved", PlayerPrefs.GetInt("CustomSaved") +1);
 
         if (PlayerPrefs.GetInt("CustomSaved") % 2 != 0)
         {
             var colors0 = Save.GetComponent<Button>().colors;
             colors0.normalColor = Color.red;
             Save.GetComponent<Button>().colors = colors0;
             
             var colors1 = Save1.GetComponent<Button>().colors;
             colors1.normalColor = Color.red;
             Save1.GetComponent<Button>().colors = colors1;
 
             PlayerPrefs.SetInt("Place", PlayerPrefs.GetInt("Place")+1);
 
         }
         if (PlayerPrefs.GetInt("CustomSaved") % 2 == 0 && PlayerPrefs.GetInt("CustomSaved") !=0)
         {
             var colors = Save.GetComponent<Button>().colors;
             colors.normalColor = Color.w$$anonymous$$te;
             Save.GetComponent<Button>().colors = colors;
 
             var colors2 = Save1.GetComponent<Button>().colors;
             colors2.normalColor = Color.w$$anonymous$$te;
             Save1.GetComponent<Button>().colors = colors2;
 
             PlayerPrefs.SetInt("Place", PlayerPrefs.GetInt("Place") - 1);
 
             PlayerPrefs.SetInt("0", 0);
         }
 
 
     }
 }

The void CustomSave() is assigned to the buttons Save1 and Save. T$$anonymous$$s works only when one of the Save/Save1 buttons are presed as else it would trigger scripts from multiple objects and it would be all glitchy. It took me a w$$anonymous$$le but i am sure there are better ways for it to work but i ust cant figure it out...