First suggestion would be to eat real food
an egg and bacon breakfast (which can be made in advance for the entire week, just grab 'n go out of the fridge) is a great start to day.
If you need to have a shake for some reason, you should try various brands and flavors to find ones that appeal to you, and are easily available. Every LC brand has chocolate and vanilla. Quest protein powder (and bars) is now sold at Walmart, in reasonably priced 2 pound canisters. Easy for me to buy, I like the chocolate milkshake, (vanilla seems too sweet to me..but you may like it). To that I add frozen berries, big handful of "power" greens, almond or coconut milk (full fat canned makes a super high fat drink), sometimes nuts or flaxseed for healthy fats too. Quest has just introduced a Ketogenic Shake but not at my Walmart.
Designer Whey is at Trader Joe's, and IsoPure Zero Carb at many health stores like Vitamin Shoppe. ISopure brand has the advantage of many flavors like Strawberry and Banana Creme but they come in large expensive canisters. Only a few flavors on-line are sold in smaller paks to try (I did not like berry but love the banana..matter of taste only) Sure there are more brands, I don't use them often and don't seek out the zillion new LC options you might find at bodybuilder stores. These all still have some type of artificial sweeteners, they have to, whey protein tastes horrid by itself. AS or the dairy proteins can send insulin up for some and derail your LC diet.
#1 tip is still...JERF. Just Eat Real Food. Healthier, more satisfying and nutritious, even easier to prepare with some planning. All the best,