Unity UNet: I control the other player but shooting works with spawned player

This is my first post here, I am creating a multiplayer game with UNet (I know its obsolete at this point) but I am at a point where I know a bit about setting up the multiplayer game like making a network manager, UI etc. The problem is with "isLocalPlayer". I have used "isLocalPlayer" and I had partial success.

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5. using UnityEngine.Networking;
6. using UnityEngine.UI;
7.  
8. public class Player : NetworkBehaviour
9. {
10.     Vector3 inputValue;
11.     float speed = 10f;
12.     float rotateSpeed = 1f;
13.     //public Vector3 point;
14.  
15.     //public GameObject bulletPrefab; // spawnable object
16.     //public Transform bulletSpawn;
17.     //public Transform[] bulletLocations; // lsit of spawnable locations
18.     //public float spawnTime = 3f;
19.  
20.     int bulletNum = 0;
21.     private bool rightHandSide;
22.  
23.     //Cannon variables
24.     public GameObject projectile;
25.     public Transform[] rightGuns;
26.     public Transform[] leftGuns;
27.     public Transform[] otherGuns;
28.  
29.     // UI Variables
30.     public Image healthBar;
31.     public Text healthPer;
32.     public Image armourBar;
33.     public Text armourPer;
34.     public Text timerText;
35.     public Text scoreText;
36.  
37.     // Health Variables
38.     private float health = 1f;
39.     public float Health { get { return health; } set { health = value; } }
40.     private float armour = 1f;
41.     public float Armour { get { return armour; } set { armour = value; } }
42.  
43.     // Time variables
44.     private float time = 0f;
45.     private string timer;
46.  
47.     // Score variables
48.     private int score;
49.     public int Score { get { return score; } set { score = value; } }
50.  
51.  
52.     // Start is called before the first frame update
53.     void Start()
54.     {
55.         //InvokeRepeating("Spawn", spawnTime, spawnTime);
56.     }
57.  
58.     // Update is called once per frame
59.     void Update()
60.     {
61.         #region Commented out/Old code
62.         /*if(Input.mousePosition.x > Screen.width / 2)
63.         {
64.             rightHandSide = true;
65.         }
66.         else
67.         {
68.             rightHandSide = false;
69.         }
70.        
71.         inputValue.x = Input.GetAxis("Horizontal") * speed * Time.deltaTime;
72.         //inputValue.y = -Input.GetAxis("Horizontal") * speed * Time.deltaTime;
73.         inputValue.z = Input.GetAxis("Vertical") * speed * Time.deltaTime;
74.         transform.Translate(inputValue);
75.  
76.         transform.Rotate(0, Input.GetAxis("Horizontal") * rotateSpeed, 0);*/
77.  
78.         /*if (Input.GetKey(KeyCode.A))
79.         {
80.             transform.RotateAround(point, Vector3.up, 5 * Time.deltaTime);
81.         }
82.         else if (Input.GetKey(KeyCode.D))
83.             transform.RotateAround(point, -Vector3.up, 5 * Time.deltaTime);*/
84.  
85.         //spawnIndex = Random.Range(0, bulletLocations.Length);
86.         #endregion
87.  
88.         if (!isLocalPlayer)
89.         {
90.             return;
91.         }
92.  
93.         if (Input.mousePosition.x > Screen.width / 2)
94.         {
95.             rightHandSide = true;
96.         }
97.         else
98.         {
99.             rightHandSide = false;
100.         }
101.  
102.         inputValue.x = Input.GetAxis("Horizontal") * speed * Time.deltaTime;
103.         //inputValue.y = -Input.GetAxis("Horizontal") * speed * Time.deltaTime;
104.         inputValue.z = Input.GetAxis("Vertical") * speed * Time.deltaTime;
105.         transform.Translate(inputValue);
106.  
107.         transform.Rotate(0, Input.GetAxis("Horizontal") * rotateSpeed, 0);
108.  
109.         healthBar.fillAmount = health;
110.         armourBar.fillAmount = armour;
111.         timerText.text = timer;
112.         scoreText.text = score.ToString();
113.  
114.         CmdFire();
115.  
116.         healthPer.text = Mathf.Round(health * 100) + "%";
117.         healthBar.color = Lerp3(Color.red, Color.yellow, Color.green, health);
118.  
119.         armourPer.text = Mathf.Round(armour * 100) + "%";
120.  
121.         time += Time.deltaTime;
122.         timer = string.Format("{0:00}:{1:00}", time / 60, Mathf.Floor(time % 60));
123.        
124.         //print(Health);
125.     }
126.  
127.     public override void OnStartLocalPlayer()
128.     {
129.         //GetComponentInChildren<Camera>().enabled = true;
130.     }
131.  
132.     [Command]
133.     void CmdFire()
134.     {
135.  
136.         if (Input.GetMouseButtonDown(0))
137.         {
138.             if (rightHandSide)
139.             {
140.                 FireCannons(rightGuns, otherGuns);
141.             }
142.             else
143.             {
144.                 FireCannons(leftGuns, otherGuns);
145.             }
146.         }
147.     }
148.  
149.     private Color Lerp3(Color a, Color b, Color c, float t)
150.     {
151.         if (t < 0.5f)
152.             return Color.Lerp(a, b, t / 0.5f);
153.         else
154.             return Color.Lerp(b, c, (t - 0.5f) / 0.5f);
155.     }
156.  
157.     void FireCannons(Transform[] guns, Transform[] other)
158.     {
159.         if (!isLocalPlayer)
160.         {
161.             return;
162.         }
163.  
164.         foreach (Transform spawner in guns)
165.         {
166.             Instantiate(projectile, spawner.position, spawner.rotation);
167.         }
168.  
169.         foreach (Transform spawner in other)
170.         {
171.             Instantiate(projectile, spawner.position, spawner.rotation);
172.         }
173.     }
174.  
175.     public void OnTriggerEnter(Collider other)
176.     {
177.         if (other.gameObject.tag == "Debris")
178.         {
179.             health = health - 0.1f;
180.             print(health);
181.             Destroy(other.gameObject);
182.         }
183.     }
184. }
185.  

When testing, the player host (left build screen) can move around by itself, can shoot (all well and good). When the second player joins in, the turrets of the first player move at the same time when the second player does. When the first player shoots, the second player doesn't show it has but the first player can see the second player shoots the bullets but the second player can't shoot, however.

Whenever the first player moves (left side), the second player moves according to the first player and the second player's screen is lagging.



I would like to know what have I made mistakes on in my movement code and if possible some code to solve the issue. Also, the UI is messed up which doesn't matter in this case.