First of all, welcome. It’s awesome that you’re here and that you want something better for yourself. I tried to get sober alone many many times. It didn’t stick until I reached out and found connection here. I can’t recommend it enough. Other people here have also found that connection with AA.
Have you checked out the What’s YOUR plan? thread? It has a ton of great information.
I absolutely think you need to talk to a medical professional about the withdrawals you may experience. That’ll give you your best shot at doing this safely.
Keep coming back here and checking in. Every single one of us is rooting for you. 