Sicily is just perfect for food tours, but it's difficult without a car: public transport between small towns is rare, and family wineries and farms where cheese or olive oil is made are almost impossible to reach. I usually book a car in advance through aggregators, such as https://findycar.com/car-rental-sicily/ — Car Rental Sicily allows you to compare prices from different companies and choose a car based on size and conditions. A small hatchback will be most convenient for narrow streets and historic centers. Parking is sometimes paid, but there are almost no problems outside the city. It is better to take extended insurance — the roads are sometimes narrow and rocky. A car will give you complete freedom to plan: tastings, trips to the beach, morning markets — everything at your own pace.