You are being a troll now. Stop it.
You actually can use it in your handle, so long as your handle is your full legal name. FWIW.
I will try to say this nicely, hopefully rather than coming across as annoying or arrogant. I passed all three levels on the first attempt because I planned and expected to do exactly that.
The prep material I would recommend:
CFAI curriculum volumes 1 - 6