Welcome to BYC! If you haven't started your coop yet, now isn't the time to get any birds. I did that, and boy, did I regret it! I had 22 noisy, dusty chicks in the house and nothing ready for them to move into.
You want a coop with plenty of room, good ventilation, plenty of room, solid roosts, plenty of room, inviting nests, plenty of room and one that's easy for you to work in. I think a good run is also essential...there will be times when you just can't let them out wander in the yard and they need the fresh air, sunshine, and elbow room (wing room?) rather than tight confinement all day. The design is up to your building skills, your budget, your neighborhood and your imagination but if you provide the basics the rest will fall into place. I'd try to avoid commercially made "cutesy coops". They rarely hold the number of birds they claim they do and their construction is often pretty doggone weak and poor. You can buy a shed at a big box store l like Lowe's or Home Depot and they will usually deliver it right to your place. Then a few tweaks and you are good to go. One thing to remember....coops are rarely if ever "finished". I"m still making improvements on mine! <sigh>
Make sure you do your homework about predators. You might not think you have any, but there's nothing like the call of a chicken dinner to prove otherwise. I've seen an entire family of raccoon come out of a storm drain in downtown Denver ....yep, smack dab downtown! And while wild animals might not be an issue in your area, anyone's dog can get out of their yard and decimate a flock in short order.
I prefer to get chicks in the spring and raise them up during the warmer months. Then they are ready to lay in the late summer/early fall. I don't raise my chicks indoors at all anymore...I start them outside and keep them outside. They are stronger for it and I am much happier for it! Lots of other people feel the same way I do.
https://www.backyardchickens.com/a/yes-you-certainly-can-brood-chicks-outdoors
Again, welcome to BYC.....and by the way I'm also a Diane!