formal domme training for my wife

hi all i am lookingform a experienced misstress to guide my wife in the arts of domination. she is my sub but wants to have subs of her own, which i am happy with. ive never had formal training as a dom but i cant teach her the things that a misstress could. i would be present but no involvement on my behalf misstess with slaves would be good, but any willing subs ( m or f) and a misstress(experienced and hard) also welcome D+L