Welcome to the forum.
It's hard to kick bad habits, but quite possible.
I suggest you make improvements in your lifestyle in small increments and ensure that the changes are sustainable and enjoyable (or at least bearable!). Just improve bit by bit, repeating positive actions, such as getting up off the couch and going for a walk around the block, until they turn into habits. Getting past that inertia is the hardest bit.
Alcoholic drinks are full of useless carbohydrates and can be a major contributor to weight-gain. Good on you for removing them from your diet.
Also, you may notice your energy levels rise once you start eating less and the weight starts going down. More energy is one of the side-effects of weight-loss and can become part of a positive feedback loop.
Finally, don't give up, and don't treat it as just a diet. The only way a person can lose weight and keep it off in the long term is to change their lifestyle and themselves. It's not just a case of having to move around more and eat less, it is a case of becoming the type of person who moves around more and eats less.