Shooting A Projectile With an Arc

Hey all, I've been working on a script to launch a projectile in an arc and I've managed to cobble this together. EDIT: With the current code, the projectile is shot, but the calculation seems to be off. It will always overshoot the player. :/ EDIT 2: So I just calibrated the numbers and it seems to be fairly accurate now.

Help would be appreciated. Thanks In advance!

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class TripleArcShoot : MonoBehaviour {
 
 
     public Vector3 targetPos;
     public float speed = 10;
     public float arcHeight = 3;
     GameObject enemy;
     public float DistanceFromPlayer, CoolDown;
     public int AttackRadius;
     public Vector3 InstPos;
     public GameObject instantiatedObj;
     public GameObject ProjectileGM;
 
     private Vector3 ShootDir;
     public float ShotSpeed;
     private Vector3 EnemyPos;
     private bool FL, FR;
 
 
 
 
     void Start()
     {
         enemy = GameObject.FindGameObjectWithTag("Player");
         targetPos = enemy.transform.position;
         AttackRadius = 15;
         CoolDown = 5;
     }
 
     void Update()
     {
         if (enemy != null)
         {
             DistanceFromPlayer = Vector3.Distance(enemy.transform.position, this.gameObject.transform.position);
             if (DistanceFromPlayer <= AttackRadius)
             {
                 Attack();
             }
         }
     }
 
     void Attack()
     {
         if (transform.position.x > enemy.transform.position.x)
         {
             InstPos = transform.position + new Vector3(-1.5f, 0f, 0f);
             FL = true;
         }
         else
         {
             InstPos = transform.position + new Vector3(1.5f, 0f, 0f);
             FR = true;
         }
 
         CoolDown -= Time.deltaTime;
         if (CoolDown <= 0)
         {
             Debug.DrawLine(transform.position, enemy.transform.position, Color.cyan);
             EnemyPos = enemy.transform.position - transform.position;
             ShotSpeed = Mathf.Sqrt(Mathf.Abs(EnemyPos.x) / 0.0781678003f);
 
             if (FR)
                 ShootDir = new Vector3(1.0f, 1.19175f, 0f);
             else
                 ShootDir = new Vector3(-1.0f, 1.19175f, 0f);
 
 
             instantiatedObj = (GameObject)Instantiate(ProjectileGM, InstPos, transform.rotation);
             instantiatedObj.GetComponent<Rigidbody2D>().velocity = ShootDir.normalized * ShotSpeed * .80f;
             Destroy(instantiatedObj, 4);
             CoolDown = 5f;
         }
     }
 
     static Quaternion LookAt2D(Vector2 forward)
     {
         return Quaternion.Euler(0, 0, Mathf.Atan2(forward.y, forward.x) * Mathf.Rad2Deg);
     }
 }