First I'm not trying to be a jerk, but all the questions you asked have been asked 1000 times on this forum. If you use the search bar in the upper right corner you can get way more answers then waiting for someone to post here.
Flushing is ultra debated. I always tell people to do their own tests with flushing and not flushing. However I personally did those tests 10 years ago, and realized that flushing is nonsense. You can not biologically "remove nutrients" from your buds. Thats not how it works. The only thing "flushing" will do is leach the nutrients from your medium, and then starve your plants.
Many people will start flushing once new calyxs have stopped growing and the pistils have receeded, then the plants are in the last 2ish weeks of flower where they are maturing. I've watched the weight that plants put on during that time frame, so I don't like to starve my plants while they are trying to do work.
Drying and curing is another thing that almost everyone does different and you can get awesome results from various methods. Personally I remove all the fan leaves while its wet, and break down the plant to individual buds with just the frostiest sugar leaves yet. I dry them this way on a screen for about 7ish days and once they are slightly crispy on the outside but still soft inside I toss them into a paper bag to balance the humidity in the buds. They stay in there for another few days till they are just right, and then I either jar/bag them for storage as is or trim the sugar leaves and then jar them(all depends how much trim there is per strain) I never liked the jaring damp buds and burping the jars and all that. It seemed like a lot of pointless work when I get tasty good smelling buds otherwise.
. Thats why I still gave you the info!
