I suggest if you are seriously interested in getting a bike that you do indeed look into this website: http://www.msf-usa.org/
It is a course that is part written, and part actual riding to help you become more friendly on a bike. Even if you have never been on a bike they teach you and over a (3 day course when I took it) will get you comfortable riding. Also, riding a sport bike(such as an R6) is NOTHING like a dirtbike. If you assume it is "just like a dirtbike with more power" you are in for a rude awakening.