wanderingred Your over thinking all this. Just let her figure out holding the revolver, Not really a wrong way and buy the time she fires a few round she will have it figured out.
Breakin?? Just clean the bearcat and lube it , buy some cci standard or even the new cci quiet ammo and shot away. No need to worry about how many rounds to get at its best. Rugers barrels are good barrels to start with.
Bearcats are very cool revolvers for small hands.
Look at the photos at the top and bottom of the page to help with holding a SA revolver.