@nottechsavvy 

Firstly, please be sure the internet is available on the C2300 router, and there is a WAN IP address. You can login to the router web GUI and go to Advanced > System Tools > Diagnostics, do a simple ping test, try pinging some public IP addresses like 8.8.8.8, then some public domains like www.google.com, be sure you can get a valid reply. If yes, that means the router is connected to the internet fine.

Secondly, be sure your TV is obtaining an IP address from the router automatically, you can check if it is correctly showing up on the router DHCP Client List, you can try to ping that IP to confirm if it is connected to the router fine. If you cannot fine the TV there, I guess the TV may not get the IP address from the router successfully or it is using a static IP, please find it out, and ensure it is in the same IP subnet of the router. If you are not how to find the IP of the TV, try to Google that from internet.