So do u call them by their real name or christian name? So weird
for me to start using them. SO how do i start using them?
When you introduce yourself to people, you can just tell them
"Hi im Randy, nice to meet you! You have a cute butt btw....
"
I have friends who dont have christian name on their IC.... They
just use the name they came up with themselves.... eg. Kazuya
(example nia la. I suppose you dont call yourself E-Honda or Chun
Li rite). In the end, most of us dont know their real name but just
their christian name. 
Then sometimes see their IC.... we went
"woah Kazuya, your real name is actually Lee Xiao Ming ar!!"
So start using your new name starting from today.... Theres no
standard process to start using it.... Just use it casually lor.But
if you are applying for bank cards etc, you must use your real name
(whatever is on your IC). But for other casual stuffs, like booking
restaurant seats, you can use your Randy Lee.
Randy Lee sounds nice anyway.
I used to call myself Randy y'know.
Anyway, did you go find out the meaning of 'Randy' or not?