Tvheadend

Dear geniuses, thank you for letting me participate in this forum at your side.
I wanted to tell you about my project, to inform you that I need help and advice for my limited IPTV experience.
I am a small ISP and in my country it has become very complicated and I see myself in the obligation to expand my network and incorporate another service, so I can continue in my esteemed ISP.
on a ubuntu 16.04.4 LTS install TvHeadEnd, I think the software is excellent. very friendly graphic interface.
I'm going to buy restream channels from iptv and offer my clients iptv in the APK (ott player - ss iptv - iptv smarter) direct to SMART TV. Samsung Tizem - LG WebOS- Noblex Android - Sony Android - Philco Android -TCL OperaTV - JVC are the brands that predominate here.
The connection from the ont - router would be by cable lan not by wifi.
Another idea that I do not know how to do it would be movies and series with the same similarity VOD but free only to increase the channel grid.
Something important would be if they tell me the method of resetting the TvHeadEnd configuration, one of my ways of learning is to touch everything, and I have installed it many times.
Dear friends, thank you for allowing me to be by your side**