Hi, @Gio1
I second the AF alternatives, but they aren't for everyone. I also think that there is no one size fits all, and you have to work out what's right for you. I discovered that in my case drinking was a habit, so I replaced the habit of drinking with another one. I still opened a bottle of 'wine' in the evening, but it was AF wine, which I got used to after a while. The ritual of opening a bottle and pouring it into a wine glass really helped. I still went out to eat and went to bars, but I drank lime and soda. I suffered from insomnia, so I made going to bed as nice as possible, with scented oils in the bedroom, and scented baths to relax before getting into bed. I watched 'easy' series on TV if I couldn't sleep, and knowing that I could do that took away a lot of the anxiety about lying awake. I also listened to hypnosis tracks when trying to nod off. Even if they did nothing, they are very relaxing. The biggest change for me was giving up work, but I realise that's not an option for everyone.
I also second the VitB. Thiamine deficiency can cause wet brain, and you have to take it as soon as you give up to prevent that, if it's going to happen. Take it for 6 weeks or so, and be sure that you get at least the recommended dose of B1 (which is Thiamine). As I see it, although wet brain is rare, for the sake of swallowing a few pills a day it's too big a risk not to do it.
I told people I'd not been feeling well, and decided to cut out booze and caffeine to help. After a while, people were used to me not drinking, and if anyone did ask I just said I hadn't missed it so had decided not to take it up again. Whether close friends believed me or not I don't know, but it's nobody's business but mine.
I didn't like quit lit, as it reminded me of drinking. I know a lot of people rate it though, so it might work for you.
Good luck, and check in when you can. Sid is our mascot, and I'm sure he'll take you under his wing too.