In this world, "people" come in all shapes and sizes. Feel free to choose any ancestry (except Half-Giant and Ooze/Construct) and background (except "Made a BAD Choice").
You can take the mechanical benefit from any ancestry and create your own flavor for it or call it something else: just create a background and physiology that works for you. Every race is originally of human stock and is the result of intentional experiments by wizards over the millennia...and favorable (or unfavorable) mutations.