I want to quit cold turkey

I'm one month of every day use, I've smoked minimum 0.3 to max 1g a day. It's becoming economically and physically unsustainable, I don't even gather so much fun anymore, I just nod and I can't do anything. I've been using in the past but I don't think with this frequency, and I've always alternated with opium. I started smoking because I was already addicted to opium and it's so hard to get off it because of all alcaloids inside. How long do you think it will last? From the very first 12hours without it it's already unsustainable. I have 25mg lyrica blister, if you have some other tips please let me know. What scares me the most is the post withdrawal, last time i had super invasive panick attacks and a huge depression