Add better cards. O-Ring should be main-decked, Idyllic Tutor should be added, and your win-conditions shouldn't be based on drawing more cards; they should win you the game the moment they land. Add something like a Titan or an Eldrazi to abuse all the mana Enchantments you can burn through; with one Enchantress out, you can easily cast 3 or more of them in one turn. Speaking of mana Enchantments, you could add Trace of Abundance and Heartbeat of Spring.
Everyone knows that good luck and good game are such insincere terms that any man who does not connect his right hook with the offender's jaw on the very utterance of such a phrase is no man I would consider as such.
I've seen this discussed a bit before the official rise of modern. At that point the majority thought that modern enchantress doesn't work well enough to be viable.
Legacy Enchantress works because 1 enchantress is a shrouded creature, the other is an enchantment, which give resistance to removal - the enchantress creatures only die to wraths and the enchantments only die to enchantment removal. The modern enchantress's all die to the same thing.
Combined with the lack of things like solitary confinement, serra's sanctum, etc, it just can't hold out well enough.
If you do carry on though, Yamikiri is right on O-Ring, and tutor. However, the eldrazi thing is off. The premise of the enchantress archetype is to win off the enchantments. Legacy uses luminarch, sigil, words of war and maybe form of the dragon. Unfortunately, words + serra sanctum is the best way and modern doesn't get it.
With your main cards (the enchantresses) usually coming out turn 3, and you not having done much before that, are you really expecting to win in this fast paced meta? Even if you drop a sprawl turn 1, enchantress turn 2 and sigil turn 3, you still haven't done anything to affect your opponent.