Is a Yamaha R6 an okay bike for an 18-year-old female?

I plan to get a 250cc bike soon and then, when I get better at riding it, get a 600cc bike. My brother had a Yamaha R6 and highly recommended it; however, I am 5'7" and he is 6'6". Am I too short? What else would be a good choice for my 2nd sport bike?
 
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