Hohige
Explorer
The former is entirely dependent on world-lore, though it's mentioned as a possible path (not the only one) in the books.
As to the latter ... It's clear from Tasha's that having sorcery points is no longer dependent on being a sorcerer. Maybe it's a wizard who figured out how it's done; maybe it's a cleric with the abilities bestowed by their deity.
You use the Sorcery power that was born in you, to improve your spells. You are a sorcerer.