I concur with the largest segment of this post; start with something that is fairly small (my first bike was a 1994 Suzuki GS500E) and used; mechanically sound, but has some small cosmetic issues. There are two kinds of [new] riders; those that have dropped their bike, and those that will. EVERYone drops their first bike, and no matter how old and beat up it was, you still cry.
Folks will mention the "need" for higher power bikes, but it just isn't so. Anyone can twist a throttle and go fast; having to really learn how to maneuver a bike without simply powering through things will make you a skillful and much better rider; don't be fast, be quick.
Once you've spent a solid year or more with your first bike (this assumes you are a full-time rider) and you feel like you've gotten everything you can out of it, you'll be ready to hand it off to someone that's more skillful, whom will show you that you have only just begun to learn. Ride their line, feel humbled, and then go get something that makes you happier.