I live a short bike ride away from the shops. I have some side bags for the ebike I built so lugging groceries isn’t too much of an issue.

The biggest shift is learning you wouldn’t shop the same way you do with a car. With a car you go to a big supermarket and load up a trolley. Spend over a hundred for a week’s worth and drive home. With a bike you kinda just buy as needed for the next couple days. You do more trips throughout the week which is kinda nice too. Forces you to get out of the house more. Benefit I realised when doing this was vegetables were less likely to just die out in the fridge since I bought as needed. Which meant I spent a little less overall.