Glad you're still trying. Benadryl is your friend if you can't sleep, the first couple weeks. If it was easy and fun to quit, we wouldn't have this problem in the first place. I have been there, the "now I'm going to conquer life, this is going to be awesome!" feeling-- it's transitory, it never lasts, it's not real. The flip side of that coin isn't real either-- "my life is over, I'll never have fun again, what is the point", etc.
The reality is that you have today. Your best chance to get another today tomorrow is to not pick up a drink today. Your best chance to not pick up a drink today is to use whatever part of the AA program will keep you from doing it. Rigorous honesty, I love this thread and these dudes and I'm sure everyone else (like me) is glad to see you check in, but posting here is probably the weakest tool available to you. You might be surprised at how good going to an AA meeting and blubbering like a bitch actually makes you feel, in early sobriety. It made me feel better.
When I was in detox in May of 2018, I got suicidal and let it slip to one of the nurses that I had made a plan and acquired a method to kill myself. That got me forklifted over to Shoal Creek, into the loony bin, where in reading the paperwork carefully, I found out that while this whole detox and rehab thing were "voluntary" (meaning I could leave any time I wanted), being at Shoal Creek itself was not voluntary and those doctors could keep me there indefinitely if they judged me a risk to myself or others. I wasn't even allowed to go outside the first 24 hours. I remember looking out the window and being shocked at how helpless it made me feel to know my ability just to go outside was out of my control. I literally prayed to God to get me out of that situation. Please at least get me to where I can fucking go outside so I'm not locked up in a crazy hospital.
Later that same day, I was discharged to my long-term rehab care and ended up at a Westlake AA meeting. I was sitting in that meeting angry and depressed and thinking this whole thing was just wasting time until I could kill myself and then I realized, my prayer had been answered. I got out of Shoal Creek, out in the sun for a bit, out to an AA meeting, etc etc. I humbly and desperately asked God to get me out of there and he did, practically immediately.
That gave me a little hard-won gratitude, which, when I kept it in mind, helped me through some of the harder times that were still to come.