If you’re looking for info on SH SYD and MEL, then I assume you would want LH SYD or MEL.
currently LH FO on the 330 in the most junior base (MEL) is over 10 years.
don’t rush to the 737. There’s plenty of time to enjoy the lifestyle LH offers. Jump over about 3-4 years before LH FO if you really want to. Remember though the 737 is a dying fleet now, the flying will look very different in a few years, and no one really knows what the 321 will look like yet.
I came early, I’ve been here a long time, if I had my time again Id’ve stayed LH SO about another 5 years.