Unity5 Script to pick up a object, and drop it does not work correctly. [Newbie]

So i'm currently trying to make a script that can pick up an object and hold it, w$$anonymous$$le walking around and also drop it whenever it's wanted. I followed t$$anonymous$$s Tutorial, but for some reason it does not want to work correctly.

The item stays on the ground, even when it tells me the item has been picked up.

     using UnityEngine;
     using System.Collections;
     
     public class PickUpObject : MonoBehaviour
     {
         public GameObject mainCamera;
         bool carrying = false;
         public GameObject carriedObject;
         public float distance;
         public float smooth;    
         // Use t$$anonymous$$s for initialization
         void Start()
         {
            mainCamera = GameObject.FindWithTag("MainCamera");
            
         }
     
         // Update is called once per frame
         void Update()
         {
             if (carrying)
             {
                 carry(carriedObject);
                 checkDrop();
                 //rotateObject();
             }
             else {
                 //Debug.Log("can pickup");
                 pickup();
             }
         }
     
         void rotateObject()
         {
             carriedObject.transform.Rotate(5, 10, 15);
         }
     
         void carry(GameObject o)
         {
             Debug.Log("trying to pickup");
             o.transform.position = Vector3.Lerp(o.transform.position, mainCamera.transform.position + mainCamera.transform.forward * distance, Time.deltaTime * smooth);
         }
     
         void pickup()
         {
             if (Input.GetKeyDown(KeyCode.E))
             {
                 int x = Screen.width / 2;
                 int y = Screen.height / 2;
     
                 Ray ray = mainCamera.GetComponent<Camera>().ScreenPointToRay(new Vector3(x, y)); //   mainCamera.camera.ScreenPointToRay(new Vector3(x, y));
                 RaycastHit $$anonymous$$t;
                 if (Physics.Raycast(ray, out $$anonymous$$t))
                 {
                     PickUpAble p = $$anonymous$$t.collider.GetComponent<PickUpAble>();
                     if (p != null)
                     {
                         carrying = true;
                         carriedObject = p.gameObject;
                         p.gameObject.GetComponent<Rigidbody>().isKinematic = false;
                        // p.gameObject.GetComponent<Rigidbody>().useGravity = false; //    rigidbody.useGravity = false;
                     }
                 }
             }
         }
     
         void checkDrop()
         {
             if (Input.GetKeyDown(KeyCode.E))
             {
                 dropObject();
             }
         }
     
         void dropObject()
         {
             carrying = false;
             carriedObject.gameObject.GetComponent<Rigidbody>().isKinematic = false;
             //carriedObject.gameObject.GetComponent<Rigidbody>().useGravity = true;
             carriedObject = null;
         }
     }

Also if possible, I would like to be able to rotate the item w$$anonymous$$le holding it or even trow it. But i've got no idea how to do that. :(