Long-term drinker also. Two weeks in to sobriety. It's not been easy but I keep focusing on each day, and make a specific plan that begins the moment I leave work and continues on until bed. I am just beginning to feel some noticeable changes in sleep and health (small changes right now, but I will take them!), and I am determined to keep going and see more.
Like you, I started having health issues. High blood pressure, triglycerides, weight gain, other things. I had to start facing it - how much longer could I go on like this? So, in partnership with my doctor (who I was finally honest with), I march forward, and she's OK with my goal of eventually getting off of blood pressure and other meds. if my life style changes can get those back to normal range on their own.
I was really NOT looking forward to talking openly with my doctor about this, but it was the best thing I ever did.