First, Press the second button from the left, aka, B.
Second, Set the month, date, time, and your birthdate (in that order).
Third, Press the B button to return to the screen with your tamagotchi.
Fourth, Your tamagotchi should hatch within minutes. When it does, it will tell you wether it is a boy or a girl.
Fifth, Name your tamagotchi with a 5 letter - name.
Notes: Button names left from right: ABC
Black baby: Boy
White baby: Girl
If your tamagotchi is generation 1, you will have to set a username.
You can find random names in Tamagotchi Name Generator.
When setting time, date, ect, press A to scroll, B to confirm, and C to go back one spot.
P.S. Sorry to confuse you.