With regard to previous experience on the FBW aircraft, even if joining with experience on the A330 ie 1000hrs you will still have to serve your time on the 320/21. The CCQ courses onto the 330, however, have gone down the seniority list to joiners from 2004. Depending on future manning requirements of the fleet you'd probably expect a year to 18months before operating the 330 again. Moving to the left seat on it is a different matter, probably 8-10 years after getting your command, which I believe is running at approx 6 years.