Old UI for New UI

Unity Engine
1

Hi guys, i create a script where i can choose between 2 classes and when i choose the class it saves the vase stats in the player, but i use the script below with old UI. Now i know how to create the new UI Canvas/Images/Buttons but i dont get how to script the stats load in character with the new UI button… If can anyone help me i will appreciate.

I just want the same 2 buttons for 2 classes and the start button.

using UnityEngine;
using System.Collections;

public class CharacterSelect : MonoBehaviour
{
    public BasicStats[] AllClassStats;
    public bool ClassSelectWindow;
    public GameObject User;

    //public Texture mage;
    //public Texture warrior;

    // Use this for initialization
    void Start ()
    {
        ClassSelectWindow = true;   
    }
   
    // Update is called once per frame
    void OnGUI ()
    {
        if (ClassSelectWindow)
        {
            if (GUI.Button (new Rect (Screen.width / 2 - 100, Screen.height / 2 - 150, 200, 40), "Mage"))
            {
                AssignBaseStats (0);
                //ClassSelectWindow = false;
            }
       
            if (GUI.Button (new Rect (Screen.width / 2 - 100, Screen.height / 2 - 100, 200, 40), "Rogue"))
            {
                AssignBaseStats (1);
                //ClassSelectWindow = false;
            }   

            if (GUI.Button (new Rect(Screen.width / 2 - 50, Screen.height / 2 + 50, 100, 30), "Start"))
            {
                ClassSelectWindow = false;
            }
        }
   
    }

    void AssignBaseStats(int classChosen)
    {
        var Comp = User.GetComponent<UserStats> ();

        Comp.UserClass = AllClassStats [classChosen].UserClass;
        Comp.baseAttack = AllClassStats [classChosen].baseAttack;
        Comp.baseDefense = AllClassStats [classChosen].baseDefense;
        Comp.baseAttackSpeed = AllClassStats [classChosen].baseAttackSpeed;
        Comp.baseEvasion = AllClassStats [classChosen].baseEvasion;
        Comp.baseHitPercent = AllClassStats [classChosen].baseHitPercent;
    }
}
2

I think what I would do instead is make an empty canvas prefab, and a blank button prefab. Make 2 variables to where you can assign those prefabs then instantiate them, then you can assign textures, child objects, whatever you want from there.