Camera, Look rotation, smoothly?

"How to lock first person camera onto an object freeze mouse look and do it smoothly? "

This is what I have at the moment, it lets me switch between targets smoothly.

However it does not alter the look rotation on the y axis.

How can I achieve this? and how can I get the camera to smoothly correct itself after all targets are down or I have deselected targets. Thanks in advance!

 void Update () {
         if(Input.GetKeyDown(KeyCode.Tab) ||
         selectedTarget.GetComponent<EnemyHealth>().enemyDown == true){
             TargetEnemy();
         }
             
         myTransform.rotation = Quaternion.Slerp(myTransform.rotation,
      Quaternion.LookRotation(selectedTarget.position - myTransform.position), 
       rotationSpeed * Time.deltaTime);
     }