Zero waste on Instagram isn't different from any thing else. It looks really nice and aspiring, but it's not necessarily what reality is, nor what you should do. For instance, there are so many cute unpaper towels, sometimes rolled up just like paper towels. In reality they get stained and dirty pretty quickly, if you actually use them as replacement for paper towels.
So instead of buying nice things, we just bought about 20 pounds of cleaning cloth which are recycled and cleaned drying towels, such as this one:
https://www.amazon.de/gp/product/B00R68GX32/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&language=en_GB&psc=1You can't do everything at once. Look at your plastic trash, and every week pick one item and try to replace it with something that uses less plastic (less, not zero).
We used to buy a lot at ALDI, including tons of organic produce and products. Once we prioritized non-plastic, we pretty much switched to other grocery stores. Aldi is great, but at least here they do not have any bulk option and were slow selling non-packaged produce.
For a lot of products there are alternatives available with less packaging and less plastic. We switched to bamboo toothbrush. Not perfect, because it still involves plastic and bamboo from China, but it's less plastic overall which is what we focus on. Soap and dry shampoo replaces bottles. There are toothpaste tablets that replace conventional toothpaste. The are dishwasher tabs that have no plastic.
Instead of buying bread you could look into getting a used bread machine and buying flour in bulk. In general, buying bulk is an easy way to reduce (not eliminate) plastic waste, because you need less packaging per weight unit.
At least where I live, Amazon has become one of the greener delivery options, if you can't buy something locally. They use paper based duct type only and deliver with electric vans. While packaging is usually plastic free, it's still single-use paper packaging, though. And you might not agree with the way they do business.