[Abagail]

192.168.0.50 isn't your external IP. You need to portforward your server, it's the only option unless your router or whatever you use automatically allows all open ports(which is rare unless you're using something such as a VPS). If using windows, you usually also have to add samp-server.exe(the one in your directory specifically) in windows firewall(search "Allow an app through firewall" in windows).