I primary for a month and then keg and age for another month. By the time August 16th (my girlfriend's birthday) rolls around, the smell is gone and the cider is good.
1. I can't.
2. If it smells ok, give it a taste.
3. I ferment for a minimum of 4 weeks.
Here are a couple of links I used when I wrangled yeast.
http://www.milkthefunk.com/wiki/Wild_Yeast_Isolation
https://bootlegbiology.com/diy/capturing-yeast/