A Suzuki GN 250, a Yamaha Virago 250, or a Kawasaki EL250. The GN is the most wallet friendly option, but the latest batch are made in China and some people have had issues with Corrosion. A mid-'80's GN will be both cheap and less likely to rot.
The Yamaha is a higher quality option, but low speed parking accidents or 10 km/hr accident approaching intersections seem to be the new rider's most common type of accident making the GN a little less heart breaking to chuck on it's side.
The Kawasaki is the one I like as it shares the engine and gearbox with a very common bike that has just been reintroduced as a new bike, the GPX250 (18 years of continuous production!). However it is watercooled making it a more expensive (comparatively) maintenance option.
Sorry I'm not a chick, but I know lots of people recommend those three for beginners of limited vertical reach of any gender.
First picture below is the EL250, 2nd is the GN250, and third is the Virago 250.
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