Welcome back, Gay! Just a few months left!
Since you are first time guests with Disney Cruise Line, your online check-in window will open 75 days prior to departure. At that time, you can
log into your reservation online and begin to complete the check-in process. During this process, you'll be able to enter information about your pre- and post-cruise stays or flights, assign a credit card for your stateroom account, choose your Port Arrival time, print your cruise documents, enter passport information, and of course, choose all the exciting extras like Port Adventures, Adult Exclusive Dining and Spa Treatments. During online check-in, you can also register children for the Oceaneer Club and Oceaneer Lab so they'll be all set to play!
While you wait until your booking window opens, I suggest you browse those activities on Disney Cruise Line's website so you know which extras (Port Adventures, Adult Exclusive Dining or Spa Treatments) you might like to reserve. Since previous Disney Cruise Line guests will get to check-in 90 or more days prior to sailing, you'll want to be sure you log in as soon as you can so that you are able to book those extras before they fill up.
Once you arrive at the port around your assigned arrival time, simply check in at the desk, present them with your online check-in documents that you've printed ahead of time and you'll be all set! There will be a separate line after checking in at the port for families to register their children for the Youth Clubs and pick up Mickey Bands (bracelets they'll wear allowing them entrance into the clubs). However, if you've already registered them online, you can skip that line and pick up a Mickey Band at the club, saving you time.
Let me know how else I can help, Gay! Have fun planning!