@pkhuong@zwarich The other thing is that it's impossible for almost anyone to learn a non-trivial thing sufficiently in "one pass". So if you're psychologically stuck on wanting to completely understand everything before proceeding, you will never get to understanding. One of the joys of learning is that you get to revisit the basics throughout your life and understand them a little bit better each time. But especially with your first encounter, you just need to trust the process.