IPTV service itself is just a service that pushes live streams to you, you can pick any one, but how you go about receiving it is where you get real choices. Most decently good IPTV services offer their own app, but the best of them offer external links so you can receive your service through 3rd party player apps such as "perfect player" or "tivimate". The player you use only matters if it creates undue lag, if everything is playing smooth it doesn't really matter which app you use to do so, so feel free try a few out and find one that's suits your needs. I personally love "Perfect player" it doesn't have many bells and whistles, but it gets the job done smoothly for me.

One thing to mention is premium IPTV services usually charge you "per connection", I always email them to see if a "connection" is "per screen" or "per network IP" because a lot of the time the "per network IP" ones allow multiple screens as long as it is all on the same home network while "per screen" will shut you out for using two screens at all.

Research research research, I know it's hard and everyone is all hush hush all the time, but there are resources out there on google if you don't mind a little digging.

No, there is no step by step guide. You have to understand that this type of IPTV is illegitimate in most countries so it tries to stay underground and out of prying eyes as much as possible. It's like asking if there a guide on how to launder money.

Do you have any device to use? Firestick is a good starter. Install apps like Smarters, tivimate. Look for services with free trials that you can try, see which is best for you. Once you get hands on, you will learn more how it works.

Your system is most important. WiFi speed and dedicated device. Don’t skimp on equipment get a good router-(asus or tp link). As far as your dedicated device you can’t go wrong with Formuler.