Alcohol and weight loss

31F, 176cm and 70-71kg depending on time of day. I would like to lose about 5kg by June to go back to my normal adult weight, but my weight has been consistently the same for a few years now. I don’t think that I overeat, although admittedly I also don’t monitor what I eat, and after some personal hardship, I have been consuming too many empty calories in the form of alcohol, esp. for the past year. Does anyone have success stories of losing weight with the help of exercise despite not cutting down on alcohol, or are my attempts in vein lest I quit?