I taught an online course on two topics, one was white slut training and the other was training for cuckold couples. Both courses were 10 weeks long, all conducted online - the cuck course had 6 couples from across the country and the white slut course had 4 girls, all from the west coast. I am on the east coast.
as some of you have pointed out - the hard part is finding where Experienced teachers are and if they are available to teach. Not all big cock masters can teach. I prefer a woman that has a desire to learn, any woman that is an expert already does not need me at all.