Hey there Rosa,
Welcome to planDisney! I'm so glad you stopped by with your question - it looks like your trip is coming up in just a few short weeks!
It sounds like you, too, are strong in the ways of the Force. If you're hoping to purchase
Individual Lightning Lane access to help Rey, Finn, Poe, and the Resistance in the
Star Wars: Rise of the Resistance attraction during your visit, then you'll need to wait until you scan your tickets to enter the park to make that purchase.
I do think this is a really smart way to go, as the wait times for this attraction can get pretty long! Typically, when I visit with my family, I purchase Individual Lightning Lane access for this one as the wait is usually too long for our little guy to endure.
However,
Individual Lightning Lanes and the Disney Genie+ Service cannot be purchased until you have scanned your tickets to enter a park for a day. In my experience though, for the attractions that have Individual Lightning Lane access, this should not be an issue and they typically do not sell out - though they are subject to availability. From the past few times I've visited, the return times for these Individual Lightning Lanes have remained within a couple of hours from the purchase time.
Thank you again for your question, Rosa! May the Force be with you as you help put a stop to Kylo Ren and the First Order!
Have a Magical Day,
Greg