It's best to trim the leafs off when you dry. You also should trim not only the fan leafs, you can toss most of them anyway. But the small leafs close to the buds should be trimmed as well. That trimming you save for hash and you trim it close to the bud. You prefer to smoke the bud (flower) and not smoke the leaf. When you smoke leaf you are smoking more plant matter then THC but when you smoke the flower you get less plant matter and more trichomes.

a little warmer up to 80f - 87f would be better and get the humidity down to 25% or less and they would dry better and quicker.

After they are dry you trim off the stems and stocks and place the buds in glass mason type jars to cure at room temperature with the lid on tight. Open them once a day the first week for about 20 min then close them back up. The second week you only open the jar if there is still moisture showing.

You should have cured bud in 10 day's to 21 day's. The longer you cure the more mellow it gets.

Hanging them is not required it's just easy for most people.

A little indirect light will not harm them at all at this point. Keep indirect air moving in the room with drying plants.