Gold star for you. Yes, there is life beyond the internet. People have been doing this stuff long before forums were readily available. We bought books and read them. A used FSM will cost less than a tank of fuel and be an invaluable source of information for as long as you own your Z.
It depends on your skills/experience. For some people here it’s a walk in the park. For others, not so easy. I’d say, if you’ve never done anything like it or much EFI work, it will probably be a bit of a challenge. Pretty much all modern aftermarket EFI packages are capable of a multi-coil system and they’re all just a little different. Find a local EMS dealer and see what system he recommends and talk to him about your ignition choices. A good dealer will be happy to help you understand what ‘his’ system will require.