You appeared in an old timeline called "Stone Age". You need to survive the cold anyways. You're a normal person, but the others are Homo Sapiens/Erectus/Habilis/Neanderthals/etc. They are your neighbors and they're called "Hunter Gatherers". They hunt Mammoths, Giant Bison, Deer, Wild Horses, and they can also go fishing! They use stone weapons to hunt! Sickles, Spears, Clubs (Stone Hammers), and Hand Axes. They have houses, and the houses are called "Long Houses".

The Hunter Gatherers probably speak gibberish, because they have no languages! Anyways, survive in the Stone Age and enjoy your stay.