Please don't breed her, if your mare is tempermental then she could possibly pass these traits on to her foal. Breeding should be done to bring out and pass along the best possible traits.
A friend of mine bought a mare that she didn't know was bred. The mare was was very rideable but she was tempermental. The mare stomped her own colt while stalled overnight, it was very sad.
I like mare magic, my mare isn't very tempermental but I figured it couldn't hurt and might save her from the dreaded curse of being a chic
When I paid a friend to work with my gelding, I was outside with him everyday when he did roundpen work (he used CA) so that I could practice as well, watching the videos are great but having someone coach you through it is priceless.