Welcome back!
And don't be sorry, you're not 'totally wrong', you're totally right to ask for help for your drinking.
I'm a lot older than you and started drinking much later in life... but it still did me damage and I'm glad, so glad, I stopped ten months ago.
Seeing your doctor for a safe detox is a good idea as withdrawal from alcohol can indeed be dangerous.
Having some sort of plan or 'program' for staying sober is also a good idea. I'm staying sober using this site and my fantastic addiction counselor. But whatever you do to stay sober, put your whole heart and soul into it.