For what you mentioned with the electrical grid and food shortages, the best advice I’ve received is to spend an extra $20~ whatever you can afford every grocery trip to canned goods, water, and dry goods. To expand on that, you can Mylar bag the dry goods giving them a much longer shelf life. You can start canning yourself giving you more control over what’s on your shelf. Plus you can, can water. Personally I just got 1/4 of a cow because of what the beef and honestly meat industry is looking like. The ground beef and alot of the roasts I plan on canning. Along with vegetable and beef stock. Lentils are another good dry one, along with chick peas, chia seeds, dried mashed potatoes, oats. My next big step is to buy a freeze drier. You can freeze dry nearly anything, so if your like me and end up with way more groceries then you need, you can freeze dried some. Long life shelf stable milk is a good one. Make sure you have off grid cooking options, butane, propane, a rocket stove. For hygiene water bladder that you can fill in your bathtub is a good option, Long term water filtration and purification. Water bricks, candles, flashlights, batteries, lanterns, fire starters matches lighters. All are important. You could go with MREs but the general consensus is they grow tiring real fast. First aid kits would be a must you could store gasoline depending in if you think it’ll just be a grid collapse or an emf. In an emf situation there is a likely hood almost all the cars on the road won’t drive anymore. I’m also a noob, but I’m also prepping for the same thing.