The way I stopped drinking was to put down that last drink (forcibly, as I was arrested) and never open a new one. Stop for just one day, you can do that. And that’s the start of staying stopped.
If you need medical help, get to a detox facility or emergency room.
Here is an excellent list of things that have worked for one of our fellows to get sober.https://talkingsober.com/t/2-years-sober-and-what-helped-me-to-get-there/99392