Congratulations on deciding to quit drinking. Every day makes you healthier, among other things that are more important (peace, relationships, outlook on life, the list is endless). ... no matter what, NOT putting alcohol in your body will help.
Don't drink today. Start a plan (mine is AA) - repeat tomorrow. Things will follow. You can do it- regardless of how old you are or how long or much you drank.
Hope to see you here.