Over the Edge
Sorcerers carry a magical birthright conferrer upon them by an exotic bloodline, some otherworldly influence, or exposure to unknown cosmic forces. One can't study sorcery as one learns a language, and more than one can learn to live a legendary life. No one chooses sorcery; the power chooses the sorcerer.
The base Sorcerer is found in the 5E Players Handbook, a pdf of the PHB can be hound here.
Customization for the Sorcerer consists of choices for Sorcerous Origin (all Sorcerer choices are shown below):