If you can boil water, you can can. Jars are reusable. Lids will be your most scarce commodity after a while (you shouldn’t reuse the lids after they have been under pressure). Build a little smokehouse and you can preserve your meat.

I don’t even worry about downloading how to’s. There are libraries and book stores that have this information that isn’t dependent on any kind of electrical device to access it. These sites probably won’t be high priority scavenge sites to the average survivor either.

Winter meals will be mostly canned veggies, bread, and beans for protein. Salt or smoke cured meats infrequently. You’ll learn to trap small game or hunt deer. Surviving will be a lot of work but it’s totally within reach of anyone who can camp or is crafty/handy.