This will be my second spring with chickens- I started last June with 6 chicks. 2 BO, 2 EE, and 2 GLW. One of the wyandottes turned out to be a rooster and we rehomed him a few weeks ago. We can have roosters but he was really rough with the hens. I have loved them even more than I thought I would. They seriously make me happy. We got our first egg on Thanksgiving day (Easter egger was first!) and they are all laying now. I am planning to add 3-4 more chicks this spring but haven't decided whether to let one of my girls brood hatching eggs or just get chicks again.
I do have some advice from a 1 year veteran...
I live in a very cold climate so YMMV.
Water - this is the biggest pain. Those tiny chick waterers are super gross. As is any open water type system. You'll end up washing it 17 times a day. Get them used to a horizontal nipple type waterer asap. If you live in a mild climate the vertical nipples are fine but I had a lot of trouble keeping the vertical nipples from freezing once it got cold. I have a bucket based 4-horizontal nipple waterer with a bird bath de-icer now and it's perfect. Easy to fill, super clean, doesn't leak.
When brooding - keep them close to your house if you have cold nights when you get them. You will want to check on them a lot (uh, 17 times a day) and the closer they are the better. I used a puppy playpen in the garage until 5 weeks. I'm also a freak and got a security web cam so I could check on them from my phone.
Also when brooding have a plan for power failures. Our power went out when they were a week old and that heating pad went cold fast and they started shaking and huddling up. I ended up putting them in a box on the front seat of my car and driving around with the heater cranked and a bunch of handwarmers in a pillowcase in there with them. Maybe find a neighbor/friend who wouldn't mind you bringing them over with their heating pad until the power comes back!
I got lucky and bought a house where the previous owner had already built a coop, so no advice on coop building. But bigger is better..I already need to expand it for new chicks