Well I had to learn from nothing, I learned how Assembly language worked on SNES, made a Hello World homebrew for SNES, and then things started to make sense when I had emulators that had debugging functionality such as trace logs. So I don't really have tutorials to recommend, I'm sorry. But learning to make a homebrew in assembly language for old consoles would be very enlightening to understand a lot of lower level computer science basics and therefore using it to reverse engineer like I did.