Set small goals to start with - maybe no drinking for a week for example...lots of empty calories, there! (I'm not saying quit drinking forever - just be mindful of the fact that there is no nutrition.)
Find a plan that works for you if you need structure. I count calories, but there are any numbers of plans that fits the way you live.
You don't need a gym to exercise, you can use DVD's at home...or just take a walk!
5 pounds a month is doable - that's a pound and 1/4 a week...