Usually between 1.5 hrs to 2; usually we would like to begin practices 2.5 months from the day of the quince.

Also, it depends on the kids & their schedules, how quick they learn the dances, weather events, etc.

YES! We have kids whos parents would love for their child to be a dama/chambelan due to socializing, kids wanting to learn to dance, for them to get out of their comfort zone. 

Not at all, we take our time teaching the kids. We do want them to be comfortable with what they are learning/experiencing. Also, we tell the kids we won't have them do a step/dance that we cannot do.