Dont sweat it, I'm sure your Captain will have been there before and can help you along no matter where you are in the world
A couple of things that annoy me:
1/ Calling "Fully ready" or "ready on reaching" or "Ready in turn"
2/ "The Cathay…"
3/ Continually addressing the call sign of the station being used, e.g. "HK ground CX 123 Bay E3 req pushback" and then next call "HK Ground CX 123 Taxi" You don't need to address them each and every call, only first contact or when there has been a time lag between calls or on HF.
minor stuff really, but still a little annoying
p.s. In Oz you can use the phraseology "Cathay one seventy three" if you like
( and not the usual Cathay 173 )