Hi and welcome, Manfriday! There are many structured plans for quitting drinking including AA, AVRT, and SMART. These seem to be the most discussed here on SR.
I would suggest reading about all of them and picking the one that seems to be the best fit for you. Based on people's stories, they all seem to help if you really want to quit and do the work the method requires.
Good luck. Keep posting if you have questions or just to let us know how you are doing. See you around the forum.