How can I combine these two rotations?

So I'm fairly new to unity and I'm trying to make a camera that can rotate around a player in all directions when right click is held, (Similar to roblox camera controls).

 using UnityEngine;
 using System.Collections;
 
 public class Camera_Controls : MonoBehaviour
 {
 
     public float turnSpeed = 4.0f;
 
     public Transform player;
 
     private Vector3 offset;
 
     private Vector3 offset2;
 
     private Vector3 cameracontrols;
 
 
 
 
     void Start()
     {
         offset = new Vector3(player.position.x, player.position.y + 2f, player.position.z + 9f);
 
         offset2 = new Vector3(player.position.x, player.position.y+ 4f, player.position.z + 25f);
 
     }
     void LateUpdate()
     {
 
         if (Input.GetKey(KeyCode.Mouse1))
         {
 
             offset = Quaternion.AngleAxis(Input.GetAxisRaw("Mouse X") * turnSpeed, Vector3.up) * offset;
 
             offset2 = Quaternion.AngleAxis(Input.GetAxisRaw("Mouse Y") * turnSpeed, Vector3.right) * offset2;
 
             transform.position = cameracontrols + player.position;
             
             cameracontrols = new Vector3(offset.x, offset2.y, offset.z);
 
             transform.LookAt(player.position);
         }
     }
 }
 

T$$anonymous$$s is the code I have and it is not giving the desired result. What is the easiest way to make t$$anonymous$$s work in the way I intended?