Just doing it. I think that's really the key here. Love watching a few courses like this but at the end of the day you just gotta do it. Test some sh*t, realize that you're in a local maxima and that testing more button variations won't do shit, try other stuff. But again always keeping the main idea of Lean alive - identify hypothesis and understand the why not just the what.
How about you? What are you reading/doing?