I would worry freeze dried foods may cause more problems with the fry than needed.
As per my research, frozen baby brine shrimp and hatching your own Baby Brine Shrimp is the same thing, except the hatch Baby Brine Shrimp will be alive and might entice the fry to eat them easier. And the frozen is dead. I know many local breeders who feed baby brine shrimp, decapped brine shrimp eggs and golden pearls as a beginner food.
You can check out this topics Fry Foods and Feeding
for some ideas :)
Here`s a link to a Fry Starter kit
, you get 3oz of each with free shipping for $18.
Also I made my own hatchery at home with a 2lt bottle, air lines hose, air pump and a light :)
Brine Shrimp Hatchery
Keep in mind, I`m not a breeder haha These are just things I picked up along the way.