There is a similar thread on BYC that many "veterans" have posted on!
https://www.backyardchickens.com/t/...sh-you-had-known-before-you-got-your-chickens
Fairly new myself, I have spent many hours on this site!
A few of my "finds" have included bigger brooder with wire mesh lid (yes, mine were flying out at a few weeks too!),
I did use paper towels on top of shavings changed often first few weeks in brooder,
poop boards in your coop with "Sweet PDZ" sand for easy poop cleanup every day!,
giving the chicks wet food early on (which they still love!) ,
Dont spend alot on nest boxes, they prefer to wait in line for the space beneath my rubbermaid stool!
and some good coop ideas!
Like raising your kids, there are opinions and ideas that work for some, not for all!
my 6 babies are MYPETCHICKEN stock, no problems, beautiful and sweet, laying at 20 weeks, all hens! So far so good, still learning!