Your best years can be ahead of you. Start thinking that way. One thing at a time. Ditch the alcohol because if you don't, you'll be old and unemployed and dying of cirrhosis or a blackout and fall with no insurance.
Lots of us are old and our best days are definitely ahead of us because we don't drink. I see people in their 70s and 80s getting new jobs and college degrees. It's never too late to turn things around.