Wife's first bike was a 04 Shadow Aero. It was an excellent bike, low center of gravity, plenty capable of keeping up with traffic, good gas mileage and easy to ride.
By comparison my daughter's 1st bike was a 250CBR, while it was tame as far as power output, I thought it was not as easy (for a beginner) to ride as the Aero was.
For new riders, being comfortable & in control of the machine is key. Too big, too soon is never good. Good luck