I am trying to teach myself some homological algebra, and the book I am using is Aluffi's wonderful Algebra: Chapter 0, which introduces homology at the end of chapter 3.
I have spent a lot of time on this book, doing all the exercises because I am new to category theory. But when the author reaches the Snake Lemma, I felt quite lost. I can produce a proof but it is a quite painful experience.
I also searched here, and got a better understanding of the Snake after someone recommended Bergman's Salamander Lemma, but I am still uncomfortable chasing diagrams.
In particular, I am wondering whether there is some effective way to do diagram chasing. Is it just experience or I need to change my mindset?
Again I am trying to teach myself, so I cannot actually get those visual proofs.