It takes three weeks for a chick to be born. Here is a video of stages of a chick.
NOW WE WILL TELL YOU HOW TO TAKE CARE OF A CHICK
For the first week of its life, it should live in a small brooder box (cardboard box) and you have to be very gentle while holding the chick because when the egg hatches, the chick could have a broken bone.
a brooder box looks like this
When the chick gets born you need to give it water and food the water needs to be normal and the food needs to give it specific kind of food here is a slide show with picture of things to do with chicks