How to swipe only once while the action is still running?

Hi, I am new to Unity and trying to build my first android game through youtube videos and tutorials on the internet. Now I have problem and don't know how to solve it. Right now I am writing script for the player character. I want to move him from left and right when I swipe on screen. It is working, kind off.

My problems are:

1. I can swipe more than once while it is still moving. Really don't want that to happen.

2. The character is flipping from left to right spontaneously at the start untill I touch the screen. Then it is okay. I want him to facing right at the start.

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Here is my code: Any help would be highly appreciated.

   using System.Collections;
   using System.Collections.Generic;
   using UnityEngine;
   
   public class SmoothMoveSwipe : MonoBehaviour {
       private Rigidbody2D myrigidbody;
   
       private bool facingright;
   
       private float Horizontal;
   
       private Vector2 startTouchPosition, endTouchPosition;
       private Vector3 startRocketPosition, endRocketPosition;
       private float flyTime;
       private float flightDuration = 0.1f;
   
       // Start is called before the first frame update
       void Start()
       {
           facingright = true;
           myrigidbody = GetComponent<Rigidbody2D>();
       }
   
       private void FixedUpdate()
       {
           Flip();
       }
   
       // Update is called once per frame  
       private void Update()
       {
   
           if (Input.touchCount == 1 && Input.GetTouch(0).phase == TouchPhase.Began)
               startTouchPosition = Input.GetTouch(0).position;
   
           if (Input.touchCount == 1 && Input.GetTouch(0).phase == TouchPhase.Ended)
           {
               endTouchPosition = Input.GetTouch(0).position;
   
               if ((endTouchPosition.x < startTouchPosition.x) && transform.position.x > -1.5f)
                   StartCoroutine(Fly("left"));
   
               if ((endTouchPosition.x > startTouchPosition.x) && transform.position.x < 1.5f)
                   StartCoroutine(Fly("right"));
           }
   
           float move = Input.GetAxis("Horizontal");
   
           if (endTouchPosition.x < startTouchPosition.x && facingright) Flip();
           if (endTouchPosition.x > startTouchPosition.x && !facingright) Flip();
       }
   
       private IEnumerator Fly(string whereToFly)
       {
           switch (whereToFly)
           {
               case "left":
                   flyTime = 0f;
                   startRocketPosition = transform.position;
                   endRocketPosition = new Vector3
                       (startRocketPosition.x - 1f, transform.position.y);
   
                   while (flyTime < flightDuration)
                   {
                       flyTime += Time.deltaTime;
                       transform.position = Vector2.Lerp
                           (startRocketPosition, endRocketPosition, flyTime / flightDuration);
                       yield return null;
                   }
                   break;
   
               case "right":
                   flyTime = 0f;
                   startRocketPosition = transform.position;
                   endRocketPosition = new Vector3
                       (startRocketPosition.x + 1f, transform.position.y);
   
                   while (flyTime < flightDuration)
                   {
                       flyTime += Time.deltaTime;
                       transform.position = Vector2.Lerp
                           (startRocketPosition, endRocketPosition, flyTime / flightDuration);
                       yield return null;
                   }
                   break;
           }
   
       }
   
   
   
       private void Flip()
       {
        facingright = !facingright;
        transform.Rotate(Vector3.up * 180);
   
       }
   
   }