How can i combine Coyote Time and Jump Buffering with double jump?

Hello, I am working on a Character Controller, for this i followed a video... just like in the video I also included double Jump (https://www.youtube.com/watch?v=QGDeafTx5ug&ab_channel=Blackthornprod)

But now i wanted to also implement Coyote Time and Jump Buffering... so how can i do this ?

I followed some Tutorials for them but they all do not work with the double jump mechanic...

I dont know much about programming so I really need help..

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

public class CharacterController : MonoBehaviour { public float speed; public float jumpForce; private float moveInput;

 private bool facingRight = true;


 private Rigidbody2D rb;

 private bool isGrounded;
 public Transform groundCheck;
 public float checkRadius;
 public LayerMask whatIsGround;

 private int extraJumps;
 public int extraJumpsValue;


 void Start()
 {
     extraJumps = extraJumpsValue;
     rb = GetComponent<Rigidbody2D>();
 }

 void FixedUpdate()
 {
     isGrounded = Physics2D.OverlapCircle(groundCheck.position, checkRadius, whatIsGround);

     moveInput = Input.GetAxis("Horizontal");
     rb.velocity = new Vector2(moveInput * speed, rb.velocity.y);

     if(facingRight == false && moveInput > 0)
     {
         Flip();
     }
     else if(facingRight == true && moveInput < 0)
     {
         Flip();
     }
 }

 void Update()
 {
     if(isGrounded == true)
     {
         extraJumps = extraJumpsValue;
     }

     if(Input.GetKeyDown(KeyCode.W) && extraJumps > 0)
     {
         rb.velocity = Vector2.up * jumpForce;
         extraJumps--;
     }
     
     else if(Input.GetKeyDown(KeyCode.W) && extraJumps == 0 && isGrounded == true)
     {
         rb.velocity = Vector2.up * jumpForce;
     }
 }

 void Flip()
 {
     facingRight = !facingRight;
     Vector3 Scaler = transform.localScale;
     Scaler.x *= -1;
     transform.localScale = Scaler;
 }

}

I really hope you Guys can Help me... thanks for every Answer :)