you can still drink when you're diabetic, it's just not as easy as it is for a non-diabetic. you have to be more aware of carbs in the drinks you've having, the effects of different types of alcohol on your sugars, and the "morning after" effect.
Depending on the type of beer you are having, you have to take a shot for the amount of carbs in the drink (I think the CalorieKing online site can give you that info if you type in what kind of beer it is). I find that beer usually effects me the least, but everyone is different.
Hard alcohol is tricky, the actual alcohol makes your blood sugar drop usually while you're sleeping so you wake up low, but your blood sugar will go high before hand, if you mix it with regular pop or juice.After drinking for almost 10years, I still find hard alcohol and shots are hard to predict.
One thing I've learned is that it's really important to test, take your nightly shot as you normally would and be around people who know you're diabetic, so if something happens they know to call 911 and not just let you "sleep it off".
Because you're new to diabetes and you're not yet on carb ratios I would suggest talking to your endo about what to do when you want to have a beer after dinner. It's not advised to drink while Diabetic, or smoke, but you can still do it..you just have to be careful and working out a plan with your doctor is important. I took the trial and error route, as I was 14 when I started drinking, but I have been diabetic since I was 6, so I felt at the time I knew I could handle it.