Here are a couple of links to answer your questions about Mama Heating Pad in the Brooder and brooding outdoors. I raised one group of chicks with a heat lamp. If that was the only option available to me I'd have stopped right there and never bought another chick! Then I found out how to raise chicks by duplicating a mother hen and I've never looked back.
https://www.backyardchickens.com/t/956958/mama-heating-pad-in-the-brooder-picture-heavy-update
Yes, it's a big thread, but if you go to page 4 to see the video and page 46 to see Bee's setup, that will help simplify it, I think. It's just a Sunbeam Ex-Press Heat heating pad, available either through the links on the thread to
Amazon or sometimes at
Walmart or Walgreens. All you have do do is make sure that you can bypass the auto-shut off feature, and it will say right on the box "With Stay On Feature" or something similar.
Why a heating pad? Chicks need periods of cool to grow strong, to learn to see to their own comfort, and for the hours of natural darkness they don't get with a heat lamp. A lamp heats up everything around it...the walls, the brooder floor, the air, the food, the water, and chicks run themselves into exhaustion. You can try to provide a cooler end in the brooder, but it's all still too warm. They run until they drop right where they are, trying to get some much needed sleep. The problem with that is they never all take a nap at the same time - some chicks are always still running around the brooder. They see the chick laying there asleep and tromp over top of him, peck his toes and eyes, and he's up!! Who could sleep like that? With a heating pad, they duck under there for a quick warmup or if they get spooked, then they're back to exploring again. But when it starts to get dark, they amble underneath Mama Heating pad, snuggle down, and sleep all night through, ready to wake up with the sun and get back at the busy life of growing and learning. Many of us have noticed that our chicks feather out faster, are calmer, and much more confident in their ability to take care of themselves. It's not a broody hen, but it's as close are you're going to get.
After my first experience with chicks and the heat lamp, I knew there had to be a better way and set out to find it. EcoGlow brooders are great, but they are rigid - and expensive. I wanted an alternative that seemed more like ducking under a Mama and less like ducking under a shelf, and I had a budget to be concerned with. I found Patrice Lopatin's video on raising chicks with a heating pad, and then my good friend @Beekissed filled in the blanks for me. What I've ended up with is a frame with a heating pad either draped over it or bungee corded to the inside. Easy.
As for raising chicks outside, again, couldn't be easier. I raise mine outside in Northwestern Wyoming when our springtime temperatures are still in the teens and twenties. I couldn't be happier. Here is a link to that information.
https://www.backyardchickens.com/a/yes-you-certainly-can-brood-chicks-outdoors
Breed choice is up to you. But while your organizing your brooding supplies, don't overlook getting the coop and run built! They grow fast, and will need a predator secure, weather-wise place to live before you know it. Best thing is to have it ready before you get your chicks. Good luck!! And welcome to BYC!