From my experience Sebrights are some of the hardest birds to take care of. They are very flightly, can be a little on the mean side, and fight to the death. In my layer flock my main Roo is my almost 1 year old Sebright Chulo.
This bird fought a 2 year old RIR for dominance and got seriously injured. During his downtime he contracted pneumonia and at one point didn't eat for a few days. Well that little dude fought and got better. He became so well, that now he is the main roo of my full sized layers (which consists of EE's, Leghorn X's, Barred Rocks, a Naked Neck, and a golden laced Wyandotte.
Did I mention that he flies? Alot. And not just get a few feet off the ground like a chicken, I've watched my dude glide. They are almost un-chicken like. Point being, this breed is strong and very dominant. They are not necessarily aggressive, their flight and toughness just give them an advantage over some birds. Not to mention they were critical in the origin in Darwin's Theory of Evolution (they are named after Sir John Sebright, Dawin's homeboy).
Anyways they should cared for like any other bird, a coop is crucial. Design one with growth in mind, especially if you are just starting out. You will catch the fever in due time.
I prefer hay to straw, for economical and softness reasons. Don't ever use cedar shavings, pine only, as it is poisonous. If your girl is already laying purchase layer crumbles (pellets may be a little big for your small guys) and some scratch, with a 2/3 ratio of crumbles to scratch. Maybe even more crumbles. I like to give my guys Vital in every other watering, Sebrights have crazy plumage, gotta make it shiny! I would recommend putting Apple Cider Vinegar in your water as well, every time, as it limits potential bacteria growth (which is good if you are not changing the water everyday). If they don't free range during the day, give them a bath box - 1/2 sand, 1/4 Diatomaceous earth, 1/4 dirt. Chickens love bathing.
And you can make babies! But that's a whole other thread.
Enjoy some quality birds. And if you can master these guys, I wouldn't fear any other breed. These guys are higher level. Good luck!