If you want to skim a little before reading this ~40 part article series, might I recommend these sample pages…

• https://graphicallinearalgebra.net/2015/05/06/crema-di-mascarpone-rules-of-the-game-part-2-and-diagrammatic-reasoning/
• https://graphicallinearalgebra.net/2015/06/16/maths-with-diagrams/
• https://graphicallinearalgebra.net/2015/06/13/trust-the-homomorphism-for-it-is-fully-faithful/

That being said, do start at the beginning! :)

Update, oh, this has been on here previously: https://lobste.rs/search?q=domain:graphicallinearalgebra.net&order=newest