So I am a bit confused with Yennas ability, as it says "Choose target".

"Choose target enchantment you control that doesn't have the same name as another permanent you control. Create a token that's a copy of it, except it isn't legendary. If the token is an Aura, untap Yenna, Redtooth Regent, then scry 2. Activate only as a sorcery."

If I have Sterling Grove, does Yenna still target the Aura because it's "choosing", or is it "targeting" and not able to be targeted by the Shroud.

As well I'm assuming that if I use Yenna and target an Enchantment and they blow it up, I will not create a token? Cause if it targets they could blow up the target, but if it's CHOOSE then they would need to respond to the activation before seeing what I point it at, thus making it too late to destroy it

TIA!