Frustrated Simple Client

New and frustrated.

So I love kodi and I am running on 16.1 Jarvis. Recently I heard about IPTV simple client and manage to follow the directions to install it. So excited until I opened the tv, clicked on a channel and nothing. None of them worked. Am I doing something wrong? Here is the link of the site that I learned how to install from.

https://seo-michael.co.uk/how-to-setup-l…xbmc-kodi/

I did everything it says to do but I can’t watch anything. Can someone help, oh and need the help for dumbies not a tech gal….lol