How long is a session?

About an hour. Long enough to warm up, learn something and drill it until it holds. Short enough that you do not start dreading it.

An hour with me is not an hour in a class. No waiting your turn, no standing around while twenty other people get corrected. You work nearly all of it, and an hour is the thing people can actually keep in their week for a year. See what a first session looks like and how often to train.

Split it between two people if you like. Less attention each, and you get a live partner out of it. See training with a friend.