I didn't graduate to 250cc until my THIRD bike, a Kawasaki KL250 (if memory serves; the Enduro model).
That GZ250 would have been Waaaaay too much bike for me, as a first bike . . . ; )
Are you kidding dude? Yeah I'm way novice and no I have no regrets-- I dig my wheels to the max-- but IF I were walking into that shop TODAY I'd go 500 at LEAST... My riding has advanced enough in a month that I could handle it, no problem.
This bike is very easy to control balance and ride. It's only 300 lbs. A kid would have no problems with proper instruction.
Like I said though, it's all I need really for putzing around town on... Don't have time right now for longer trips and whatnot...