Chicken egg incubation is approximately 21 days. It can take longer if temps In the incubator are low, or less time if the temps are too high. A little bit too high; really too high or too low will kill the embryo.
Forced air incubators need temp of 99.5, I think still air incubators need 100.5.
Unpack your eggs and set them in an egg carton, with one end propped up. At least three times today, tilt it so it's propped up at the other end. Alternating. Get your incubator set up and with stable temp and humidity, the latter generally around 40-50%.
Tomorrow, set the eggs in the incubator. If you do not have an automatic turner, you will need to turn those eggs, or tilt them, at least 3 times a day, more if you can. For 18 days.
On the 19th day, stop turning/tilting, raise the humidity to between 60 and 70%, and sit on your hands until the eggs hatch. This is the lockdown period - don't mess with the eggs!
Those are the basics. Happy hatching!