Well dimensions aren’t numbered, but the interactions can be tracked by the imaginary axis method. The Imagining 10 Dimensions movie or the book We Start With a Point (but what’s the point?) are good places to start. There are also a few videos on the The The Imaginary Axis channel that are relevant: DC multiverse map, Marvel multiverse map.
Stephan Wolfram’s New Kind of Science book is probably relevant, but I haven’t got through it yet, but I listed to Wolfram on the Lex Fridman podcast #124.
The implications are horrible though. It means you aren’t safe behind that 4th wall, you may not be who you think you are, and that your magic may change depending on what you are interacting with.