Good idea on the new job front too. I used to work in bars when I was younger and still a student and part of my issue I think was that when you are surrounded by people who are drinking all the time it 'normalises' the behaviour.
Not being able to stop once you start is not 'normal' and that's my issue too. Although I now also struggle to abstain more, but that's because this is a progressive problem as anyone will tell you.
As such the sooner you stop - and please trust me stay stopped - the better!
Keep us posted as to how you are getting on .
All the best.
EM