Captain Buck!
I've had AW139 Ground school recently and if you can take on board a quarter of what they put in front of you, you're one hell of a pilot!!!
It's two weeks of instruction at the hands of people who know the aircraft inside out. If you come away with a foundation upon which to build your knowledge once in the field, then you'll be doing fine! It would be impossible to learn everything about this ship unless you spent months in the place and how are you going to do that?
The Sim training is like any other training - it's a structured course which covers the basics and gives you a start once you get into an aircraft for real. As a professional pilot, you build from there. You got any better ideas then every training facility this side of Kingdom Come will be glad to hear from you!!