It depends really, if you want to develop as a keeper you need to find a goalkeeper coaching school that is focusing on coaching and training, and who are normally training week in week out. All year round.
Because there are a few goalkeeper schools in operation now in the Minneapolis areas, it is a nightmare which is a good one to attend. But you are in luck because there is a goalkeeper coaching school in Minneapolis that is attached to the leading keeper school in the world, Just4keepers. They also offer a FREE taster session!
Check out their recent goalkeeper coaching course.