Welcome to the Fog! and KTC Quiet Storm. Congrats on your decision to take back control of your life. You've got some difficult days ahead of you, but you can do it. I'm about your same age and I know how you feel. "Is it possible to quit something I've been doing for so long?" Yes! One Day At A Time, you can do it!
Like you said, get started posting role in November. Do it 1st thing in the morning(but go ahead and get your 1st post in now) What you're doing when you post role is promising yourself and your brothers that you won't use NIC today. It's not a report on whether or not you made it through the day at the end of the day. Swap digits with the guys in your group, so you can send them a text on mornings you can't post. AND by all means, hang around and get to know us, otherwise your "promise" to a bunch of strangers won't mean squat to you.
Click on the following link for a video on posting roll. It helped me out.
PC How to post rollYou can do this, I quit with you today