How to change position to rotation object?

I'm a beginner at Unity. I want to rotate my cube by given angle data. This is referenced code. I changed position to rotation. But not worked. Help me???

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class CSV_1 : MonoBehaviour
 {
     private struct Step
     {
         public float speed;
         public Vector3 rotation;
 
     }
     public Transform Cube; 
     public TextAsset CsvFile;
     private List<Step> steps;
     private int currentStep = 0;
         
     
     // Start is called before the first frame update
     void Start()
     {
         ReadCSV();
         Cube.rotation = steps[0].rotation;
     }
 
     // Update is called once per frame
     void Update()
     {
         if ((Cube.rotation - steps[currentStep].rotation).sqrMagnitude < 0.1f)
         currentStep = (currentStep + 1) % steps.Count;
 
         Cube.rotation = Vector3.MoveTowards(Cube.rotation, steps[currentStep].rotation, steps[currentStep].speed * Time.deltaTime);
     }
     void ReadCSV()
     {
         steps = new List<Step>();
         string[] records = CsvFile.text.Split('\n');
         for (int i= 1; i <records.Length; i++)
         {
             string[] array = records[i].Split(',');
             steps.Add(
                 new Step()
                 {
                     speed = float.Parse(array[0]),
                     rotation = new Vector3(float.Parse(array[1]), float.Parse(array[2]), float.Parse(array[3]))
                 }
             );
         }
     }
 }