Don't think about it being "Day 2" or whatever. Don't think about tomorrow, next week, or next year. We'll worry about those when they get here. Just focus on quitting today. That is all you need to worry about. And anybody can quit for one day, right?
Quitting is done one day, one hour, one minute at a time (especially at first). You simply man up and post roll. That is your promise that whatever the fuck happens today, you will NOT put any nicotine in your body. Then keep your word all day.
You've taken the first step. Let us help you with the rest. Stay quit, brother!!!