Thanks a lot for the suggestion! I'm definitely going to check out the Mastering the Lightning Network Reading Group. I love that there is a way to learn this material in a more interactive way. I'm also aware of the Bitcoin Design community - I've heard great things about them! (also referring to their design guide)

Personally, I prefer reading books. I find that I'm able to take more time to process the information and take more notes. But I'm sure that the videos will be an interesting way to learn too!

Best of luck to you on your learning journey!