Welcome Aboard, Janey!
I am so glad you navigated your way to the Disney Parks Moms Panel to ask your questions about your very first Disney Cruise Line vacation!
Disney Cruise Line does not offer post-cruise Port Adventures, however, you can find plenty to do before your flight home. In the past, when we have had a later flight, we have driven to Downtown Disney to do a little shopping. Perhaps you have a Lego fan who would like to spend some time creating at The Lego Store. We absolutely loved the food at Raglan Road Irish Pub and Restaurant, if you are looking for a bite before you head to the airport.
A few years ago, we went to the Kennedy Space Center for the day. It was awesome, and I felt like I learned a TON! The lines to get in were pretty long, though, so you might feel a bit rushed. There are also some great beaches right around Port Canaveral that you could go to for free for a few hours. The restaurant Fish Lips has a view of the cruise ships as they sail out, and the food was good, too!
As I'm sure you know, there is a multitude of different things that you could do in Orlando for the day. Maybe this is the perfect opportunity to try something that you wouldn't normally venture off the Walt Disney World resort property for.
I hope you have a wonderful first cruise on the Disney Dream in less than a week!
Happy Cruising, Tracy V.