>>2170493You would learn pretty quickly, most people here who have read a few books would. Fowl and small animals are shockingly easy to kill and eat, not to mention the sheer amount of fish there would be.
Food would be a problem for about a week and then you'd find a rhythm. Shelter would be difficult if you're placed in a hostile climate, but assuming you get dropped in spring to make it fair, you could also slowly migrate south and find temp shelter each night.
The real long term risks would be injury, disease, and malnutrition. The first is impossible to prevent against so it's a moot point. The second is preventable since a) you're not around any other humans and b) you can make sure to properly cook and prepare your food + basic hygiene. The last point is negligible since you are a modern human that understands nutrients. In winter you could eat organs like the liver of the animals you hunt. In summer there would be plenty of wild herbs worth eating, even dandelion leaves to tide you over, but you'd find better alternatives just by watching what other animals like to eat.
The reality is that while it would be hard to survive, it isn't anything you couldn't learn. If our moronic braindead ancestors survived, so you can you. Even better, you're smarter than them by order of magnitude. You understand basic biology, physics, math, food science, weather science. You know from understanding history what weapons work and which don't. You can read and write so that you are entertained during those long winters.
Actually, the greatest threat would probably be loneliness. We'd all probably suicide after being alone for a decade or so.