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It will take more than a year of preparation, you need to know how to survive in each separate season. Even if you grow your own food, you are still dependent on what grows and where you can find food.
https://ia601205.us.archive.org/17/items/RayMearsOutdoorSurvivalBook/Ray%20Mears%20-%20Outdoor%20Survival%20Book.pdf
This book assumes a temperate Euro region.