You would still have the same age, gender, personality, skin color, etc. and you would be able to speak at least one local language and would know basic information of the era and place. Your family, social standing, and such would be randomly picked.
New Zealand 800 years ago. The rest of the question doesn’t matter because there were no other humans there.
That means you would doom yourself to die alone…
Or you have to spend your whole life building a boat, collecting food and being able to navigate, just to rejoin civilisation
As I’m from NZ atm I would choose here about 800 years ago as well - 800 years ago is about when the first Maori arrived - give or take a few
With my luck I’d die of a katipo spider bite in the first month lol. Also, I’m minded of the scene in the film Boy, where said boy is cooking tea for the family. “Ah no, not crayfish again!” whines his sister. (Though I can’t imagine getting sick of crayfish.) Ask yourself why the Māori started eating tītī/muttonbird…. that smacks of desperation. Pack a few kūmara in your bag, maybe an axe and a box of matches?