A great decision. Welcome to SR.
I also recommend you detox under a doctor's supervision.
So much worry and anxiety can be blown away by having a frank discussion with a doctor who is knowledgeable about alcoholism, and there are medications that can be prescribed that can reduce any problematic symptoms after your doctor makes an assessment.
I personally went to a medical detox facility and was quite comfortable during withdrawal. I asked a lot of questions before we got started. They took great care of me.
Glad to see you on SR....