How do I move towards a target in 2D?

This script should move the Sprite towards 0,0 but it does not work. It gives me the error at line 16, letter 18: " Cannot implicitly convert type 'UnityEngine.Vector2' to 'UnityEngine.Transform' "
How can I write this script to avoid the error? Thanks in advance.

The Script:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Projectile_1 : MonoBehaviour
6. {
7.     public Rigidbody2D rb;
8.     public float speed = 1f;
9.     public Transform target;
10.     private Vector2 target2;
11.     private Vector2 position;
12.     // Start is called before the first frame update
13.     void Start()
14.     {
15.         rb = GetComponent<Rigidbody2D>();
16.         target = new Vector2(0.0f, 0.0f);
17.         position = gameObject.transform.position;
18.     }
19.  
20.     private void OnCollisionEnter2D(Collision2D col)
21.     {
22.         if (col.gameObject.tag == "Player")
23.         {
24.             Destroy(gameObject);
25.         }
26.     }
27.  
28.     private void Update()
29.     {
30.         Vector2 direction = target.position - transform.position;
31.         float angle = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg;
32.         Quaternion rotation = Quaternion.AngleAxis(angle, Vector3.forward);
33.      transform.rotation = Quaternion.Slerp(transform.rotation, rotation, speed * Time.deltaTime);
34.         float step = speed * Time.deltaTime;
35.         transform.position = Vector2.MoveTowards(transform.position, target2, step);
36.     }
37. }

 

Thank you all!