Glad you could join the flock! Congrats on your chicks You could post some pics in the what breed gender section of your Unknown. I'm sure members there will be able to help you, here is the link ~ https://www.backyardchickens.com/f/15/what-breed-or-gender-is-this
You'll find lots of info in the Learning Centre (even if you have lots of experience) https://www.backyardchickens.com/atype/1/Learning_Center, and if you have a specific topic in mind, just type it in the search box - there's a wealth of information on past and present threads.
You may wish to consider joining your state thread as it will put you in touch with other BYC members in your area - just type the name of your state in the search box.
I can bet! I hatched out my first clutch (Black Australorps) nine days and ago and they already have feathers on their wings and some are starting to feather on their tails. I don't remember the first clutch of Rhode Island Reds we purchased ever growing this fast, lol.