Many of us grew up hunting,, fishing, and building stuff, but for those that haven't, now is the time to learn a little!
This is IN NO WAY going to make you an expert, but it never hurts to have more knowledge right?
Growing your own food: https://www.attainable-sustainable.net/grow-your-own-food/
Tying fishing knots: http://www.fishing.sh/htmfiles/knots/tyingtraces.html
Skinning an animal: http://www.wildwoodsurvival.com/survival/hides/trm/trm2-23pg21.html
Cleaning a fish: https://www.thespruceeats.com/how-to-scale-and-clean-fish-4691736
Reload your own ammunition: https://www.pewpewtactical.com/beginners-guide-to-reloading-ammo/
Again, not in any way comprehensive, but I'd wager most of the people on here that have grown up in the city haven't done at least one of these things, if not more.
I usually just go to Vons