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>>75247
Well OP, you can always just go north. Get rid of your material baggage, load a backpack full of your essentials, and set out across Canada. That's basically what post-civilization life will be like, minus the radiation. If you're not cut out for it, you'll know quickly, and you'll be dead in a week. If you can handle it, the last thing you'll worry about is a gun and ammunition. Even if you had a gun, it isn't worth the weight to carry it around. Safe drinking water occupies most of your thoughts, remembering your edible plants the rest. Shelter when it's stormy.
Start easy, a two weeks in the boundary waters. That'll learn ya.