Welcome to planDisney Diane!
It sounds like you are in for a real cruise adventure as you sail to
Ensenada, Mexico. If you have not already, check out all the
Port Adventures available. You may also stop by the
Port Adventures Desk once onboard. You will find plenty of beaches, shopping, and local culture to explore.
I have tried doing some research on getting your passport stamped. The best thing I could find was to ask at Guest Services onboard or ask a local Security Officer once you are in port and off the ship. Hopefully they will guide you to a location that will be able to stamp your passport as a fun reminder of your visit. I know sometimes passport stamps can be found in unusual places. When I sailed to Halifax, Nova Scotia, there was a gift shop in Peggy's Cove that actually stamped our passports for us! Do some checking on the ship and as you enter the security area for some guidance. I'm sorry I am not more help, but with a bit of inquiry and pixie dust, hopefully you will get that magical stamp!
Keep an eye on your
Disney Cruise Line Navigator app once onboard. This will be a super handy planning tool during your cruise, keeping you posted on the ship's activities, dining times, entertainment schedules, and so much more. The app even has a "chat" feature so you can keep in touch with your onboard travel pals.
Wishing you smooth sailing on your cruise and I hope you get to fill up your passport with stamps from around the world! Bon Voyage!
Cathy