Hi Michael and family! I agree with Flappy, start with the dual purpose birds. If you buy the chicks from your local feed store, you can get chicks that are a few days old or older and can always find a pretty good selection.
In terms of setup, I’d recommend building a bigger coop than you think is necessary as chicken math will get you every time! Our coop is eight by twelve and is perfect for fifteen birds (fourteen pullets and one cockerel). We used 2x4s for the roosts with plywood underneath to catch the poop. We repurposed a bunch of windows from an old house on the property and covered them on the outside with hardware cloth. Everything (coop floor, poop decks, and nest boxes) are covered with natural, washed river sand from our local quarry. The run is all sand too. The only things I would do differently, is to double the size of the covered run (it’s nine by about twenty now), and add a people-sized door from the coop into the run.
If at all possible - depending on where you live and how quickly you can build the coop and run - I’d have everything ready to go before you get your first chicks so you can raise them in the coop. That way the house doesn’t smell like a barn! The only other suggestions would be to invest in a good brooder plate (
https://www.amazon.com/gp/product/B00Y1FBEKA/?tag=backy-20) like this one, buy all your chicks for the year at one time so they’re the same age, and have a well-stocked first aid kit on hand before you buy your chicks. I made the mistake of buying two groups of chicks that are three months apart in age my first year and it was just a little difficult to watch the pecking order establish itself. (What can I say, I’m a softy!). Otherwise, good luck, hang out here as there’s always someone who can answer your questions, and have fun! Welcome to the flock!