Mod Idea Ghost

I have this idea that when you die you become a ghost and hostiles don't attack you
and you are invisible and you can be 50% transparent and will work on smp and to go back to life you find the body or go to the menu and click re spawn
as a ghost you can possess creatures_smp still thinking about that :/
you control the creatures and make them do what you want
I am not a good modder and I need help
It will be nice to have that mod and showing it on YouTube
I cant figure out how the code works netherless the programs itself
I want this mod idea to come alive
Video will be coming soon so dont block it and proper images are comming soon