moving a sprite

So I have a .PNG file of a ship and I want to move it left right up down from a top down screen. I followed a brackey tutorial on how to move top down characters but it isn't working for some reason. If someone could look at my code/ set up and see what I'm doing wrong that would be great. (Don't judge the scene I'm a beginner and just want to see things move)

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class player_movement : MonoBehaviour
6. {
7.     public float moveSpeed = 5f;
8.  
9.     public Rigidbody2D rb;
10.  
11.     Vector2 movement;
12.  
13.  
14.     // Update is called once per frame
15.     void Update()
16.     {
17.  
18.         // Input
19.        movement.x = Input.GetAxisRaw("Horizantal");
20.        movement.y = Input.GetAxisRaw("Vertical");
21.     }
22.  
23.  
24.     void FixedUpdate()
25.     {
26.  
27.         //Movement
28.         rb.MovePosition(rb.position + movement *moveSpeed* Time.fixedDeltaTime);
29.  
30.     }
31. }
32.  

 

sorry here's the image