Being sober does feel sort of flat and empty at first. I'm not sure why - I could explain it for myself, but everyone has a different reason for using so you'd expect people to feel differently about being clean. It wears off: that is, you get used to having all those extra 'empty' hours and finally figure out that you can do stuff in that time without being drunk 😄
I went to rehab - long story, but it was an incredibly helpful experience. I followed up with 8 months of meetings, then relapsed for a while, then achieved my goal of only drinking a bit, sometimes, without needing to cane it. I'm not particularly recommending this; it's actually easier to not drink alcohol at all.
Meetings are worth doing, imo. The Steps are a decent life model and, though I no longer go to meetings, often review where I'm at with them. The vast majority of English meetings make the god part completely optional, there's no pressure to say stuff you don't believe in.
I was in London, where there's a huge number of meetings so I could choose the ones I liked best. If there's a choice where you live, try a few out. DON'T write it off as not for you after your first one or two! It obviously feels weird at first. It's interesting to hear other people's stories of how they're coping (or not) and some members are fantastic speakers. Once you get the hang of them, it's really great to be able to tell the truth and chew over your worries with others who get why it's difficult. Good meetings will provide plenty of tips, tricks & tools to get you through tough times - and will celebrate every wine with you, however small.
Congrats on Day Two! 
Just one more day ... 