For the training Captains it was six weeks. For new starts i would say 7-8 weeks, not sure but could ask for you. As for pre-study, don't worry, this is a high tech bit of gear but the systems are mainly automatic, much better than the 737. As long as you are not on the piss every night, and put a few hours in each night, you wont have a problem. The SOPs are very well thought out and easy to understand and the QRH is without doubt the best I've used.