Trying to set this up to get the most out of my rocket. i found a detailed how to but it was posted in 2015. Do these instructions still apply to a new Firestick or are there new procedures?

I figured I should try to get up to speed with this IPTV as it looks like IKS is on its way out. Trying to utilize what I already have (rocket, dreamlink T5 and an LG smart tv). Did some reading and got the smart iptv app on the LG. I seem to have everything set up correctly as I get 269...