Sorry this turned out so long! I’ve made a list of the things I buy regularly, though definitely not all at the same time! I’d look to see if you see any of your own favorites (or some that sound like you’d like to try them) and pick a few to start with. If you find foods that you love, it will help you stay satisfied with this way of eating.
Bacon, chicken, ground beef, pepperoni (I like Boar’s Head sandwich style from the deli), deli ham, sausage patties (lowest carb in the freeze section- I like the spicy ones at Winco), Johnsonville Jalapeño Cheddar sausages (cheapest at Walmart- watch portion sizes as they have 3 grams of carbs each, but they taste so good, a little goes a long way), Kirkland polish dogs (Costco), steaks (whenever I see a great sale), pork chops, pork roasts, chuck roasts, tuna.
Butter, heavy cream (I like the 40% Darigold- at Costco and restaurant supply stores), cream cheese (I’ve found the Philadelphia brand to be the lowest carb- and better to use in recipes for baking), sharp cheddar, mozzarella (for fathead dough), pepper jack, parmesan, Romano, triple cream brie, Dubliner cheddar, 1000 day Gouda (at Trader Joe’s), smoked Gouda, goat cheese, feta, blue cheese etc. (I love cheese, but generally use it sparingly).
Artichokes, asparagus (not my favorite), avocado, bell peppers (red peppers too, but they’re a little carbier), broccoli, brussel sprouts, cabbage, cauliflower, celery, cucumbers, garlic (can be carby in large quantities), kale, lettuce, mushrooms, onions (green onions are lowest carb, I use all onions sparingly), sugar snap peas (a little carby, but also high fiber), summer squash (we call these yellow crook neck), spinach, water chestnuts (also carby, but add great crunch to chicken or tuna salad), zucchini.
All kinds of herbs- chives, basil, rosemary, spearmint, peppermint, parsley, sage, etc, etc.
Blackberries (my favorite), blueberries (my family’s favorite), raspberries, and strawberries. The blueberries and strawberries are the highest carb, but I’m pretty careful about how often and how much I eat any of these. When I started out, I also ate some grapefruit, but only a couple of sections at a time. I use lemons and limes in recipes and to flavor drinks.
Almonds (I find these a bit higher carb, so I’m careful with quantities), walnuts, pecans (my favorite- but pricey), macadamia nuts (very pricey), sunflower seeds, pumpkin seeds, golden flax seeds (for recipes).
Onion and garlic powder, red pepper flakes.
Oils- avocado, coconut, olive.
Butter, bacon nectar (bacon fat reserved from cooking bacon- a personal favorite), lard, tallow, chicken fat, duck fat.
Mayonnaise (avocado oil).
Pickles (not sweetened), olives (I eat these EVERY day).
Pork rinds
Apple cider vinegar (other flavored vinegars- but watch out for balsamic, it’s very high carb).
Soy sauce, Worcestershire sauce (I use small amounts as these have quite a few carbs), low sugar ketchup.
Almond flour (cheapest at Costco, by far) and coconut flour- but only if you want to try baking your own low carb breads, etc. Just be warned, once you start finding recipes you want to try, it gets expensive quickly as there can be lots of weird ingredients to buy (and every cook seems to use a different variety of strange ingredients). It can be an expensive start up process and I had a lot of TERRIBLE failures to begin with.
Swerve or Sukrin confectioner’s sweetener, erythritol, liquid sucralose (on Amazon), Sukrin Gold (brown sugar substitute), Lakanto maple syrup (made with monk fruit). I don’t personally use stevia (I find it bitter), but many do.
Good luck! Hope you find something in here that helps. Let us know how you’re doing.