This discussion may contain spoilers!
you are the player so heres the way you begin...
Wii version: create your own mii then it will go Envelotech so you get started
Xbox 360 version: create you own avatar, set up the xbox 360 knect and now you begin playing the game
3ds version: (that is the same as the wii version)
PC and Mac version: you allready get it on this video OR IS IT...
psp Go/psp version: customize your own avatar on "Envelotech"
thats all the versions
P.S. lets hope that "Envelotech" will be finished