I recall my accounting professor being fond of saying “you learn accounting through the end of a pencil.” The lessons my sailing instructor taught me over three days of instruction crystallized within twenty minutes of me sailing without his guidance. (They say there are only two kinds of sailors: those who have run aground and those that will…enough said.) Experience is the essential crucible of learning.
On the other hand, it has been observed that experience is a cruel teacher: the test coming first and lesson second.
While there are all sorts or classes, seminars, books, retreat experiences and podcasts about how to be the perfect leader, it is the process of application that counts.