She looks like an absolute treasure!! Wow, I am stunned by these photos of your girl
Obviously, she is very curious, playful, and quite mischievous!
As for pellets, I transitioned my little girl onto pellets by gradually integrating them into her seeds.
Although she didn't eat any pellets initially after she ate all the seeds, it was mainly just to get her used to the idea that the pellets existed. The first day it was about 1 teaspoon of pellets to 5 of seeds, after one or two days of this, 2 teaspoons of pellets to 4 of seeds, etc. Eventually, she'd finish off all the seeds in the bowl within a few hours, and would be begging for more, but I would make sure to not give in to her begging.
Budgies can go without food for 2 days, so don't worry about her not eating. Once she starts eating them, you can tell when this happens because their poop changes colors.
Then I would completely cut seeds for a week or two so she becomes accustomed to a mainly pellet diet, and after that period of time, I integrate seeds back in. It's now at a steady ratio of 20-25% seed and 75-80% pellets
Good luck with the transition, and you should also give her lots of veggies! It takes some birds forever
to try a bite, but they're very good for budgies and will also improve her diet.
Ivy is absolutely adorable!