Unity3d movement for android hyper casual game

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C#

Android

Unity3D

Hello.
I have this code that works quite well for moving an object but i need it to work differently.
I want it to move only when the mouse clicks and moves instead of moving where the mouse clicks.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class newmove : MonoBehaviour
{

    private Rigidbody rb;

    Vector3 pos;
    private Vector3 distance;

    public float speed = 6f;
    Vector3 tempP;

    public float maxY;
    public float minY;
    public float maxX;
    public float minX;

    void Start()
    {
        rb = GetComponent<Rigidbody>();

        tempP = transform.position;
    }

    // Update is called once per frame
    void FixedUpdate()
    {

        // If the game is paused, don't do anything
        if (PauseScreenBehaviour.paused)
            return;



        // Give the player forward velocity
        Vector3 moveVector = new Vector3(0, 0, speed);

        // Move him!
        rb.velocity = (moveVector * Time.deltaTime);



        distance = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0)) - transform.position;
        if (Input.GetMouseButton(0))
        {


            pos = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 1));

            //pos.x = Mathf.Clamp(pos.x, minX, maxX);
            //pos.y = Mathf.Clamp(pos.y, minY, maxY);
            tempP.x = pos.x;
            tempP.y = pos.y;

        }

        transform.position = new Vector3(tempP.x + distance.x / 1.5f, tempP.y + distance.y /1.5f , transform.position.z);

       
           
        


    }

    }

What I have tried:

Because i do not have much experience with touch controls yet i chose to do it with the mouse click since i only need one mouse click(touch).
It is for an android game.