Struggling to make a projectile track a target

Unity Engine
1

I’m trying to make a projectile that follows that player but I’m having trouble defining the location of the player. The error I’m getting is:

Assets\Scripts\missile.cs(12,25): error CS0120: An object reference is required for the non-static field, method, or property ‘GameObject.GetComponent()’

How can I fix this?

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

public class missile : MonoBehaviour
{
    public float missileSpeed = 10f;
    public GameObject explosion;
    public bool lockedOn = false;
    public Transform player;
    GameObject target = GameObject.GetComponent<scoregame>(); //(scoregame is the player's script)

    // Start is called before the first frame update
    void Start()
    {
        Invoke("Die", 10f);
        Invoke("LockOn", 2.5f);
        Invoke("StopLockingOn", 7.5f);
    }

    // Update is called once per frame
    void Update()
    {
        if (lockedOn == true)
        {
            transform.LookAt(target.transform);
        }
    }

    void LockOn()
    {
        lockedOn = true;
        missileSpeed = 20;
    }

    void StopLockingOn()
    {
        lockedOn = false;
    }

    void Die()
    {
        GameObject attack = Instantiate(explosion, transform.position, transform.rotation);
        gameObject.SetActive(false);
    }

    private void OnCollisionEnter(Collision collision)
    {
        if (collision.gameObject)
        {
            Invoke("Die", 0);
        }
    }
}
2

You can’t use GetComponent() in field initializers.

Put it in Awake() or Start()