Hey there Angie,
Welcome to planDisney and thanks so much for stopping by with your question!
The
Disney Genie+ service can be added either at the point of purchase of your tickets or after you scan your tickets into a park on the first day of your visit. Unfortunately, you're not able to add this service in between those two times.
However, Hakuna Matata, Angie! While Disney Genie+ service is subject to availability, it is usually quite rare for it to sell out and become unavailable. My advice would be to plan on entering one of the parks of the Disneyland Resort as early as possible on the first day of your visit and adding it on right after a Cast Member scans your ticket and you pass through the park entry gate.
The best way to get it added on will be through the
Disneyland mobile app on the home tab. You'll see a banner for the service near the top of the tab with a button that says "Purchase." Once you tap that, it'll walk you through the process and you'll be able to access it immediately to book your first
Lightning Lane return time.
The
holiday season is one of my favorite times to visit the Disneyland Resort - what a great way to celebrate! One aspect of this season that I find many people miss out on is the
Disney Festival of Holidays in Disney California Adventure Park. It is such a fun (and delicious!) way to experience holiday festivities from around the world. Check your app for all the details!
Also, make sure to keep tabs on the
Disney Parks Blog for news and info about everything happening around the Disneyland Resort during this festive season.
Thanks again for your question, Angie! Have a fun trip to the Happiest Place on Earth!
Have a Magical Day,
Greg