I need the cheapest car insurance. Just the basics. Any ideas?

Hey everyone, I just lost my job and really need to get legal car insurance ASAP in Iowa so I can start driving to look for new work. I’m 22, have a learner’s permit with no driving history, and will be driving a high-mileage 2002 Buick. My budget is incredibly tight, and I’m only looking for the absolute bare minimum coverage to legally drive while learning with a licensed person. Does anyone know the cheapest companies or any secrets to getting the lowest possible rate?