If you want to store food but don't have so much money to do the above, do this third world version:

1. Grains (wheat is among the most nutrient dense). Use boric acid to kill insects. It's safe to eat if you wash thoroughly before you eat.
2. Milk powder (make sure it is full cream - you need those fats)

All of the above stuff can last 20+ years with correct storage (don't believe me? Read these (sources: https://theprovidentprepper.org/food-storage-how-to-store-wheat-so-it-is-still-delicious-31-years-later/ https://www.thespruceeats.com/does-powdered-milk-go-bad-1388298#:~:text=Most%20manufacturers%20recommend%20using%20powdered,Some http://npic.orst.edu/factsheets/archive/borictech.html#env)

3. Soil has minerals and some other nutrients, but you need to be careful about contaminants like heavy metals and parasites. Or if you can afford it, multivitamins (freeze them - the colder the better).
4. Water filter
5. For fiber, greens, nuts etc. just grab them off trees (A yard full of food will attract government attention). You can ferment or sprout your food (including grains) to increase micronutrient density and make it easy to digest (those leaves are otherwise going right through).
6. Dried animal dung is quite useful and portable (for fire etc.). You can learn many such tricks from the third world (when your survival depends on it, its funny how quickly you lose social conditioning of what is clean or dirty).
7. Hunt animals which come your way. You will appreciate why the Chinese eat anything that moves once you live through a Communist revolution.

Learn from squirrels: https://www.livescience.com/64104-how-do-squirrels-find-buried-nuts.html and bury your food in multiple safe spots (with proper water proofing of course) because your guns aren't going to protect it from government seizures (this is what happened in Bolshevik revolution). Guns are good for guerilla warfare etc. but no good if armed government agents come to search your house.

If you can't afford piles of silver, remember food and water too can be traded for medicines etc.