I'm looking for help finding a women's sized bike that has the torque and battery capacity to make it up Pittsburgh's 25% grade streets with my groceries.

I tried to make the title pretty descriptive. I need a way to get around because I don't have a car or a driver's license. The state is threatening to cut bus funding to Pittsburgh, and if they cut my bus routes now, I would be stranded. My regular bike worked for me before I moved to a neighborhood with crazy hills. These are narrow streets that are so steep, there are stairs instead of sidewalks so it makes walking my regular bike up them impossible. https://www.pennlive.com/life/2016/10/steepest_streets_in_pittsburgh.html

The bike also needs to be able to carry a load of laundry or groceries, I don't know if mounting some kind of basket to the back or using a small trailer would be better. The basket would need to be large and sturdy enough to carry a 12 pack of soda or a few gallons of water.

I don't care if it isn't the fastest bike out there, but I do care about battery capacity since these trips might take me an hour each way.

I'm a 5'5" (166cm) woman so many bikes are too big for me. I'd appreciate your suggestions.