My partner and I are living carfree, and are near the 2 year mark. It's netted us considerable savings in terms of car insurance and gas, but it does make some things more inconvenient. If we buy a moderately large item (say, furniture) we have to get it delivered. Getting to LAX was often exciting, since city buses with even light luggage are an experience. Groceries are not a particular problem, since each of us can haul 40 lbs and we have bags and backpacks that can take that kind of weight and volume. We do shop more often than we might with a car, but that tends to mean we're eating fresher food.

A key for us is location. We will not rent an apartment that is too far from stores we need regularly. Both our place in Los Angeles and our current apartment are within walking distance of farmers markets, grocery stores, hardware stores, restaurants and various other shops that we need on a regular basis. Our LA place even had movie theatres and Target within walking distance. Even with "everything within walking distance" I usually end up doing 6 mile rides while doing errands. I could hit 16 or more given the way Madison is laid out. Sprawl is real.

Start out gradually. Take the bus when you're tired instead of driving. Ride your bike or walk when you're not. Get the bags you'll need for groceries, and use them even if you take the car. Allow yourself recovery time. Use some of the money you're not spending on the car on things you enjoy. Learn to properly pack a load. Do little baby steps and eventually you'll find you're just not using the car. (just learn from our mistake and notice *before* the thing has sat unused for 2 years)