Camera Tracks player not in the middle

Hey guys. I`m making a copycat of flappy bird called jumpy chicken and now I got a little problem, because I`m not a great coder. I want to let the main camera track the bird and I also made a little script for that which worked, but I don`t want that the camera tracks him in the middle, but a little bit more in front (Just like by the original flappy bird). I know I need to change the x position of the camera, but how? My script:

 Transform Player;

 float offsetX;

 // Use this for initialization
 void Start () {
     GameObject player_go = GameObject.FindGameObjectWithTag ("Player");

         if (player_go == null) {
             Debug.LogError("Couldn`t find an object with tag `Player` !");
             return;
         }

     Player = player_go.transform;

     offsetX = Player.position.x - Player.position.x;
         }
 
 // Update is called once per frame
 void Update () {
     if (Player != null) {
         Vector3 pos = transform.position;
         pos.x = Player.position.x + offsetX;
         transform.position = pos;
     }
 }

Help would be appreciated ;)