There are several ways to manage a broody.
Some people just leave them in with the flock, let them set, hatch and integrate on their own. For some reason my chickens never got the memo that this is OK. I end up with broken eggs or destroyed nests.
I (try to) put my broody in a separate part of the coop where she can set and hatch within sight of the flock. There is room to put a feeder and waterer in that space where she can get off the nest, stretch her legs and relieve herself. I let her hatch in that space and integrate when chicks are 1-2 weeks old.
Some people will remove a broody from the flock entirely and keep her and the chicks separate until the mother is ready to wean them. In my experience this is the hardest integration for the chicks. That's because the mother's hormones have diminished and she is no longer protective of her chicks.
However you choose to manage a broody, remember that a chicken knows far more about being a chicken than you do. I am very hands off with my broodies. They prefer as little commotion as possible when setting. You don't need to feed them while they're on the nest. Leave them be and they'll get up. Don't put food and water where they can eat from the nest. That encourages pooping on the nest and that will kill the eggs.