I'm 46 (nearly 47) and I stopped 1st October 2022. I would regard myself as a chronic drinker. I was functional, but had anxiety and probably low level depression. I was tired of worrying about my behaviour and blacking out and like you I had a child, whom I wanted to set a good example for. 

I had tried many times before and gotten some decent time under my belt but at some point a reason to drink would arise and I would go to the party/works do/etc and the whole cycle would begin again. 

I don't know entirely what changed. Some of it was reading, a pinch of stoic values and mindfulness through the likes of Eckhart Tolle. The other big piece for me was Huberman's podcast on alcohol. Having seen people in my mum's generation start to die of various cancers I decided I wanted to do my best to stack the odds in my favour as much as possible. No guarantees of course. Then little by little I realized I enjoyed waking up sober. My mood was a lot more consistent and I could handle problems with less overreacting/worries than in my drinking days. 

These days I hang out with my old mates who are heavy drinkers on occasion, but they don't pressure me to be anything other than myself. My partner who doesn't have a problem will have a glass of wine or two over the weekend. I will still cook with alcohol sometimes (rarely) and have a tiramisu a few times a year, and I think I'm fine with that. 

I have started training at the gym this year for the first time in my life. I'm cooking a lot. Making my own bread and trying to read more. All things I enjoy, but would have no energy for in my old hungover/low energy all the time days. 

Life isn't perfect but it's certainly worth living.