Go for it; it's not too late for Eps 2 and 3, though they're pretty well shaped up.
I did want to let you all know that I'm planning to reinstate the youngling slaughter scene, in light of an allusion made in TFA to it. (An allusion I did not even notice until seeing the film a second time a few days ago!) I won't say any more, for fear of minor spoilers, but you know what I mean if you've seen it.
However, the term youngling will still not be used, and Obi-Wan still won't tell Padme about this specifically. Also, Anakin in TPM still won't be said to be too old to be trained.