Question How to change the sprite when jumping, going left or right? (I'm new to unity)

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class PlayerMovement : MonoBehaviour
6. {
7.     public CharacterController2D controller;
8.    
9.     public float moveSpeed = 5f;
10.    
11.     void Start()
12.     {
13.        
14.     }
15.  
16.    
17.     void Update()
18.    
19. {
20.         Jump();
21.         Vector3 movement = new Vector3(Input.GetAxis("Horizontal"), 0f, 0f);
22.         transform.position += movement * Time.deltaTime * moveSpeed;
23.  
24.        
25.     }
26.  
27.     void Jump()
28.     {
29. if (Input.GetButtonDown("Jump"))
30. {
31. gameObject.GetComponent<Rigidbody2D>().AddForce(new Vector2(0f, 10f), ForceMode2D.Impulse);
32.  
33. }
34.  
35.     }
36. }
37.  

 

There is just about a gazillion tutorials on how to get the basics of a 2D game working.
I suggesting looking for one on youtube.

 

The thing is they are all outdated (atleast the ones i found), and the code or stuff they're showing doesnt work anymore. If you could, could you link me a video that works?

 

What about them does not work? Just as a super quick answer, to change the direction your sprite looks in, you can just flip its scale on the corresponding axis (ie multiply by -1). Walking, jumping and other movements are animations you play while certain actions are executed or certain criteria are met.
I'm not too familiar with 2D, but to my knowledge not a whole lot about any of this changed lately - at least not to a degree that would make it impossible to follow a tutorial by doing the same things.