What a massive tattoo request! 🤯 Having read it, there is a whole lot to go on. Are you going to be drawing the characters in each circle, representations of all the vices, all of the above, or something else? I’m curious what your approach will be in terms of structuring it schematically across the back. Circle, mountain, etc. I remember being surprised that Dante’s hell is frozen at the center.
There should be a lot of resources and student papers describing what you need to know @
(you need an account to see links) without needing to slog through it yourself!