I'd hit an original DL ride, probably Snow. PP is an original but the line at that time would rule it out. Snow, while far from the best FL ride, is quintessential OG
Disneyland with a short line to boot. And this particular ride features several of the fun things that makes DL so magical - watching for the evil queen peeking out the window before entering the queue building, grabbing the apple at the entrance, then tossing pennies and making a wish in the queue - that's how I'd start a first ever DL visit.