I was drinking the same as you every night but am almost a year sober so it can be done! Main advice from me would be to take one thing at a time. For me, giving up smoking, caffeine AND alcohol at the same time was just too much to fight at once. Alcohol was the one that was ruining my life the most so that is where I started. For the first few months I drank a hell of a lot of caffeine and smoked lots too.
I also had a strict routine in the first few months. Bed at the same time and up at the same time everyday regardless of how tired I was or wasn’t. My body clock soon fell into line and sleep improved greatly. Meditation before bed was key too so I could try and calm my mind an hour before sleeping.
One thing at a time, one day at a time and the only commitment I made each day was “for today I won’t drink”. You can do this! x