No one can know how a first time broody will respond to the challenge of keeping her chicks safe. You can take a wait and see approach and if there's trouble, address it then. Or you can take preventative steps to insure the safety of the chicks.
Many of us will make a floor nest in a corner of the coop for the broody. A barricade of small mesh so tiny chicks can't slip through is best. Moving a broody, though, is not all that simple. Some will accept the new nest after you show her the eggs in it, but sometimes it causes the broody to abandon the eggs.
Another problem with brooding where the other hens have access is that they are likely to want to lay eggs on top of the ones the broody is incubating. This causes the broody's eggs to break and the newer eggs may be mixed up with them. The problem with more eggs is that they may hatch later, and that opens up more issues, and it can get complicated.
This first time, you may want to just watch and see what all happens, note any problems, and then make changes to your coop for the next time you have a broody sit on eggs.