Not giving advise just past experience!
It sounds like you had a good plan of attack, you got things you need and will want. But you forgot one thing, someone to tell you to stay put and not go use. I know at like NA meeting, they say call someone. Fuck that, Im not calling nobody. If you're not here you can't stop me. That's how I saw that stuff. So when I'm ready to go thru the wd's I'll keep a trusted person close. To keep me in check. I've used meth, and Loperamide and kratom and thc/cbd oils, suboxone and methadone as ways to get clean. And they all worked, for a while. But if you don't change everything you do and everyone you know. You just wasted your time. I hate that MOST OF my childhood friends are addicts and I hate that the place I grew up and want to be, I know get anxiety when I know I have to go around there or might see someone I can pick up off. Why does everything I do and everyone I know revolve again drugs. In some way shape or form weither it be hard drugs or just some pot. It's everywhere I go. But cannabis is this opiate addicts god send. And cbd/thc/cbg/cbn. Can and will take away every withdrawal symptom, besides being hella stoned and still pretty sluggish and just no energy or want to do anything. For me, no anxiety, no upset stomach, but I still did poop more than normal but alot less than if I CT from h. I tell pepole all the time cannabis will save your life, but I think they try it and think I'm joking when I tell them the amount of cannabis I am ingesting. (Ill eat rso or make 800mg-1000mg brownies, like each little brownie piece after I cut em up are 800mg) no joke very high dose BUT no wd symptoms. By the end of my detox I'm usually sick of being stoned, for a good while. But that's just me.
Good luck.
Sending positive vibes.