Hi,
You can do it.
This is exactly why I went to AA. I couldn't stop and would end up drunk after work every single day, no matter what I did.
So I got desperate and went to a meeting. I didn't want to, it was uncomfortable but I stayed sober that day and went back the next.
I didn't really like that meeting, I couldn't relate to the people so I looked up a few more and went to them. I fairly quickly found some meetings I liked and people I related to.
There are other ways to quit but this one was free, easy and very accessible and it worked for me.
As the others said you don't have to worry or think about a lifetime of sobriety, just handle today - heck just handle this hour.
If you don't want to try a meeting how about listening to some recovery podcasts? This one is aimed at new people like you
Recovered Podcast - Alcoholics Anonymous in your pocket, it's free and there are over 700 episodes!
I recommend the Step 1, one, it's a great place to start.
Also, keep reaching out here, lots of people want to help you if you let them.
CJ.