Weeg
Enabler
Yes! Chickens love to perch in the highest possible place, you can see my article on the Top 15 Chicken Coop Mistakes for more coop mistakes like such. You can find it if you go to my profile, its under the articles section. If you can't find it, let me know and I'll link it for you.
Honestly, I don't like feeding layer. Hens who aren't laying currently, as consistency, etc don't need the added calium. Plus, I personally think that 16% protein is too low. I prefer to feed a Starter or All Flock feed which is 20% protein, and has no calcium. When feeding a starter or All flock, you have to supplment with Oyster shell. Just put it in a feeder on the side and they'll eat as much as they need.
Black Soldier Fly Larva isn't a reliable source of calcium. It should be fed as a treat at no more than 10% of the diet. Thats about 1 tablespoon per bird per day.
As long as your coop has adequate space, 4 sq. ft per bird, locking them in for a few days can be helpful. Some birds don't need it, but if they aren't using the coop its something you can try. I didn't have to coop train my bantams, but can't remember if I had to or not for my standards.
Nope! You can use whatever substrate you want! From straw and shavings, to grass clippings, fall leaves, sand, nesting pads, etc.
Depends. If your feeding pellets or crumbles, you can free feed. Most flocks are free fed, its the easiest and most afficent way. If you soak or ferment your feed, you have to feed daily. I ferment my feed and do one large feeding in the morning. They usually ration it until the afternoon, and sometimes theres even a bit left in the evening. I try to make sure they eat it all though so I don't have to deal with rodents.
Welcome to BYC! Other members may have already answered your questions, I didn't read through the whole thread. Hope you make yourself at home here, and enjoy your flock!
We're so happy you've decided to join us 
