Ok here is what you can do without all that screwing around. You have an iPhone, correct?
1.Subscribe to your fav streaming service. We use Youtube TV.
2.Buy a lightening to hdmi adapter. Amazon or Walmart. Spend the $$ to get the actual Apple brand adapter. BTW it will have 2 female ports the HDMI port and a USB port, plus the lightening plug on other end. This is the one you want. You can charge phone while using it to watch TV.
3.Download streaming service app to your phone. Open app find what you want to watch.
4.Plug adapter into phone, you will also need a hdmi cable that goes from adapter to TV. Plug hdmi into TV, make sure the input on tv is the same as the HDMI port you plugged into.
Watch your stuff without using your personal hotspot on your phone. I dont full-time but we do travel alot and I always use this setup to watch my local sports channels for local teams. Buy a 6 ft HDMI cord so you can change the channel on your phone easily.
You used to be able to cast or mirror you phone onto smart tvs but the stream services have pretty much stopped that. But using the cords works better and much quicker anyway.