Networking two separate PCs on the network

Hi all, I'm very very new to coding, and I've been trying to learn some super simple Networking stuff. I've been following this tutorial: http://www.palladiumgames.net/tutorials/unity-networking-tutorial/

which has been very helpful. Sadly, when I try to load a Client on my laptop and the Server on my desktop, it doesn't work. I've gotten down to completing the first script (before creating a cube). I simply wanted to see if I could establish a connection between two separate computers on the same network.

I didn't leave the connectionIp variable as 127.0.0.1. I changed it to the local IP of my desktop (192.168.1.2).

Opening two windows on the laptop and starting one as a server and one as a client connects properly even though the connectionIP variable isn't set to local, and that machine's IP is (192.168.1.6).

Here's the script:

 public string connectionIP = "192.168.1.2";
     public int connectionPort = 25001;
     
     void OnGUI()
     {
         if (Network.peerType == NetworkPeerType.Disconnected)
         {
             GUI.Label(new Rect(10, 10, 200, 20), "Status: Disconnected");
             if (GUI.Button (new Rect(10, 30, 200, 20), "Connect Client"))
             {
                 Network.Connect(connectionIP, connectionPort);
             }
             if (GUI.Button (new Rect(10, 50, 120, 20), "Initialize Server"))
             {
                 Network.InitializeServer(32, connectionPort, false);
             }
         }
         else if (Network.peerType == NetworkPeerType.Client)
         {
             GUI.Label (new Rect(10, 10, 300, 20), "Status: Connected as Client");
             if (GUI.Button (new Rect(10, 30, 120, 20), "Disconnect"))
             {
                 Network.Disconnect(200);
             }
         }
         else if (Network.peerType == NetworkPeerType.Server)
         {
             GUI.Label(new Rect(10, 10, 300, 20), "Status: Connected as Server");
             if (GUI.Button(new Rect(10, 30, 120, 20), "Disconnect"))
             {
                 Network.Disconnect(200);
             }
         }
     }

What am I missing? What don't I understand yet?

Thanks!