My 919 is my first road bike. I've been riding it for three years now and I LOVE it.
Having said that, I had years of experience on dirt bikes before I put a leg over a road bike. And to be honest, that first road bike was a friend's uber-powerful TW200 - watch out!!!
It was a great way to get a bit of road-going experience without having the bike get away from me with its 16 horsepower of road-ripping FURY.
From the TW200, I went to a borrowed Street Triple that I don't really fit on (as if I fit on the TW200!). So, a bit of a step up in power, then. I managed to ride it for several months without tearing the handlebar off of the bike in shear terror, so I felt I was ready for a 919.
I was correct, sort-of. It has taken me three years to feel that I am truly competent as a street rider. I still have so, so much to learn! Being over 40 helps with not biting off more than I can chew (because I ceased being bullet-proof a long time ago). Even so, the 919 is a beast, even considering that new bikes these days are double-beasts (see one my dream bikes, the Tuono V4R).
Bottom line? Somehow, ride something that is not a 919 for a time, even if you score that 919 now and park it. Something lighter, with less power. You'll thank us later.