Thanks for the feedback. Yes, I actually learned quite a bit of details for the tools & technologies I write about. Teaching / writing is the best way to learn!
It was 3 months part-time. Evenings and weekends almost exclusively though.
As for marketing, I am planning to write a blog post and/or video series where I explain my journey, what I learned, the tools I used, share scripts I wrote to make my life easier.
It's been a fantastic learning experience and I hope my story will encourage others.