Bologna is the closest international airport. Ferrara is only a 30 minute train ride away.
Ferrara is a compact town, easy to get around on foot, or better yet, on bike with the locals. There is also a local bus service and taxis are readily available. Uber does not operate in Ferrara.
If your hotel doesn’t offer bike rentals, the official website of Ferrara has a list of places to get on two wheels.