That’s food there in the back corner. You definitely want to raise up your food and water, to keep bedding out and also to keep the birds from scratching in it. My water is to the left and on a little stand. I found hanging water too easy to spill everywhere.
You can try newspaper. The hens might try to eat it? I only remove and replace bedding about once a month, but the roosting shelf gets scooped daily with a cat litter scoop, and I use a kid sized basket manure fork covered in 1/2" hardware mesh to scoop the floor maybe once every 10-14 days. There is really very little chicken poop on the floor of the coop unless the weather has been icky. The chickens prefer to be outside. But you can really clean as much or as little as you like. There are a LOT of ideas about bedding and poop handling online! If you’re looking for lower effort, check out the deep litter method. Some people really like it and you pretty much just stir the poop back into the bedding and let it rot in place, occasionally adding fresh, and then a massive cleanout a couple times a year. Since I clean stalls and cat litter every day, it just didn’t make a whole lot of sense to me, but is popular and has a vocal following!
You can definitely give your younger birds smaller stuff to roost on, but they’ll also do fine on the 2x4s. They don’t really grab with their feet to secure themselves. They’re really resting on their keel bone and stabilized by their feet, not the other way around. They might not even roost until they’re bigger, choosing to sleep on the floor when they’re young (or in your nest boxes–which is a good reason to not add those until they’re very close to laying!)
I did insulate the whole coop with foam board: walls, roof, doors. Not sure it helps keep the coop warmer in the winter–there’s a ton of ventilation, but might help a little?–but it definitely helps to keep it cooler in the summer. I figured I might as well get it in there before closing up the walls.
When I was setting up my coop and starting with the chickens, I found ALL of the choices really overwhelming. There are 1000 ways to do everything, and huge fans of everything, and those who disagree with everything :lol: It was really tough to sort through it all. How I set it up is by no means the best or only way to do it, but it has worked really well for me. :yes: One thing that I expected to like but really didn’t is the nipple waterers. They have a ton of fans out there because they keep the water clean and accessible, but I just didn’t think the birds could get enough to drink. There’s so much trial and error and finding out what works for YOU. So much more than with horses or dogs or cats. So many roads to Rome with chickens! :lol: