My code doesnt work

So i was working on my health system to test i assigned taking damage to E but it doesnt work and i couldnt find any spelling mistakes

My HealthBar Code:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class HealthBar : MonoBehaviour
{
[SerializeField] private Health playerHealth;
[SerializeField] private Image totalhealthBar;
[SerializeField] private Image currenthealthBar;

private void start()
{
totalhealthBar.fillAmount = playerHealth.currentHealth / 10;
}
private void update()
{
currenthealthBar.fillAmount = playerHealth.currentHealth / 10;
}
}


My Health Code:
using UnityEngine;

public class Health : MonoBehaviour
{

public float currentHealth { get; private set; }
[SerializeField] private float startingHealth;

// Start is called before the first frame update
private void Awake()
{
currentHealth = startingHealth;
}
public void TakeDamage(float _damage)
{
currentHealth = Mathf.Clamp(currentHealth - _damage, 0, startingHealth);

if (currentHealth > 0)
{

}else{

}
}

// Update is called once per frame
private void Update()
{
if (Input.GetKeyDown(KeyCode.E))
TakeDamage(1);
}

}

 

oh thats it i am so stupid lol

 

thanks man