In Act 1 of The Miracle Worker, according to Annie, what advantages does she have as she begins her employment with the Keller family?

When Anne Sullivan is met at the train station by Helen
Keller's mother, Kate is immediately a bit concerned about Anne's youth; she doesn't
know if Anne could possibly have the experience and knowledge, at such a young age, to
make a difference in Helen's situation.  However, Annie reassures her that along with
youth comes energy, which will be a very helpful asset in her work with Helen; Annie
also reminds Kate that she (Annie) was once blind, and can thus sympathize more closely
with Helen's disability on this front.  The two women seem to be on a positive
footing as they leave the train station, but a bit of dramatic irony is noticeable to
someone familiar with Helen's story; she has been allowed to run roughshod over everyone
for so long, that Annie's work is going to require a bit more than youthful energy and
an appreciation of what it is like to be blind.