Hey 
welcome! As you have already seen there is lots of support here. Keep checking in, good days and bad days we’ve got your back.
The Frequently Asked Questions thread is good, it has links to lots of posts which you might find helpful. My advice is to read as much as you can here and reach out whenever you need to. I have learned so much from this forum, even reading experiences of people quite different to me (in terms of drug of choice, lifestyle, country, background etc) I can often find things to relate to.
A phrase you will see often is ‘play the tape to the end’. What really happens when you drink? Try and picture that end result the next time you think, oh one won’t hurt. It’s never just one and there’s a reason you want to break the cycle. Keep that reason in mind and use it to motivate you!
That might mean going out a bit less to start with while you find your sober groove. That’s ok. There’s no rush. A month or a year or whatever feels like forever when it’s stretching out in front of you, but when you look back it’s gone in a flash. Just take it one day at a time and cross each bridge as you come to it.