Getting Ready for 2.0

Say a newbie buys Scrivener today - how much should s/he learn without making the transition to 2.0 confusing?

The core concepts of the application are not being radically changed, but some of the control surfaces are. I wouldn’t spend a lot of time memorising where things are in the menus, for instance, but going through the tutorial and learning what an index card is and how everything fits together and gets compiled—none of that is changing!