how do i make enemy AI chase my player

hey guys, i want to make an enemy AI to chase my player. the code is working, but the enemy is behaving quite strange and the hitbox is gone and i cant shoot it. i'm just a beginner, i got the code from somewhere else

public class Enemy : gamemechanic {

 private Transform target;
 public int MoveSpeed = 4;
 public int minRange;
 public bool follow;
 public float scoreOnDeath;
 private Player player;


 void Start(){
     player = GameObject.FindGameObjectWithTag ("Player").GetComponent<Player> ();

     GameObject go = GameObject.FindGameObjectWithTag ("Player");

     target = go.transform;
 }

 public override void Die() {
     player.AddScore (scoreOnDeath);
     base.Die ();
 }

 void Update () 
 {
     if(Vector3.Distance(transform.position,target.position)<minRange)
         follow=true;
     if(follow){
         transform.LookAt(target);
         transform.Translate(Vector3.forward * Time.deltaTime);}
 }

}