Unfortunately, my name is too unusual. It doesn't clearly identify me as female anyway, so I'd still be "sir" and "he" when people made the default gender assumption.
Have you considered chosing a fictional girl's name? I know of another female POTN member who thinks her real name is too difficult and she too chose a fictional name. I agree with Maureen in that it would be so nice to be able to call you something other than OhLook.