Haha, and you too, thanks! 

The Sorcerers align themselves with neither the humans or non-humans. Your sorcerer could be a part of the lodge, which is basically a sisterhood of sorceresses who wish to see a country ruled by magic. 

However, if I remember correctly, the lodge was all but destroyed after the events of the Witcher 2. So perhaps maybe you can emerge from the embers of that group, try to reestablish it or something, I'm not sure...You should ask Deamon what he thinks of the premise and maybe he could give you a few ideas for your character.

And yeah, All Witchers recorded to date have been Human and Male. And going by canon, seeing as the schools have all been destroyed, I don't think we could work it into the story to have a non-human or a female take on the role of a Witcher, unfortunately...