Great story. Can you add some detail on how much time you've dedicated to learning on a daily/weekly basis and how it fits into your family and work life?
How consistent I was from that 9-12 slot went in waves. For a couple weeks in a row I'd be at it every night, and then I'd have a couple weeks where I wasn't as productive. The summer I went through a productivity lull for some reason.
I hope you keep it going and good luck with it!