getting down won't be a problem; it's getting back up that some find difficult, and you may need to help them for a couple of days by lifting them in at the end of the day.They would have to leave the coop which is raised (we have a ramp) but it may be challenging getting off.
My new chicks face this every time without problems, and some broody hens manage to get the whole brood back up all on their own too.