Hello
is it possible to ask for fairly simple instructions on creating paths (I'd like to implement my own paths entirely) and how it interacts with classes.

Sure- I think at a minimum a path needs a spells list with spells on it. Then in your class config you just put path: yourpath

If you want your class to be able to rank up, then you'd add another path and put upgrade: secondpath on the first path.

There's more you can do with paths, but if you can get this much working it's a good place to start. Once you get this set up you could be able to /mage activate yourclass then /cast spellshop and see all of the spells in your first path.

Just FYI /mconfig editor path mynewpath now gives you a nice template to start with.