Not sure how to change script to work with newer input system

Hi, i’ve just managed to change my movement system to work with the newer movement system (despite not really understanding it) and i’m now trying to get shooting working, however I dont seem to be able to get it to work using any of the methods I have seen. any help would be greatly appreciated.

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

public class WeaponFireProjectile : MonoBehaviour
    PlayerControls controls;

    public Transform firepoint;

    public GameObject projectile;

    private float firepersec;
    public float starttimebtwnshots;

    //Overlap Detection
    public Transform Basepoint;
    Vector2 firstpos;
    Vector2 secpos;
    public LayerMask whatisGround;
    bool overlapping;

    void Awake()
        controls.Gameplay.Shoot.performed += ctx => Shoot();

    void Update()
        firstpos = new Vector2 (firepoint.position.x, firepoint.position.y);
        secpos = new Vector2(Basepoint.position.x, Basepoint.position.y);

        overlapping = Physics2D.OverlapArea(firstpos, secpos, whatisGround);

    void Shoot()
        if (firepersec <= 0)
            if (!overlapping)
                Instantiate(projectile, firepoint.position, transform.rotation * Quaternion.Euler(0, 0, 90f));
                firepersec = starttimebtwnshots;
            firepersec -= Time.deltaTime;

controls.Gameplay.Shoot.performed += Shoot;


in the OnDisable() method also to prevent memory leaks