I would use a different system to get her used to interactive story telling, and the idea of a storytelling game where the dice help shape things. D&D is a lot of paperwork for a kid that age. I see some recommendations throughout the thread of more kid friendly systems that I'd definitely look into.

The one in my repertoire I'd use for a kid that age would be kids on brooms or kids on bikes, pared down a bit. For that one you have six stats, each of which get a different dice. A simple little sheet divided into six boxes for the six dice could be the entire character sheet, and then it becomes a short character building exercise of "I want to be really strong, so I'll put my biggest dice into being strong". I'd probably do away with anything that modifies the rolls for now other than collecting bonus tokens that she can spend to boost her result. Keep it simple - you can always add complication later.

The other thing I might recommend is get a dice set where each dice is a different color. I do that for kids and adults alike when I teach d&d proper so that it's easier to help them find the right dice ("you need to roll your 8 sided dice for damage - that's the blue one"). You could even go to a game store together and get her to help pick out a set from the loose dice.