I was a binge drinker so it was mainly psychological for me. I noticed a difference in myself in terms of my mindset towards alcohol after a couple of months, after a lot of reading here and other recovery resources (some great stuff here >> Resources for our recovery). Not to say I never thought about drinking again after that, but it got easier.
In hindsight I think I had a bit of a pink cloud thing going in early sobriety which I think is good to be aware of… Cos I fell off with a bit of a bump when life became life again 
I have found sobriety to be a deep dive into mental health issues. There’s been a bit more to untangle than I realised, so it’s not been all rainbows and unicorn farts! But I am getting to know myself in a way I never expected and even when it’s hard it’s definitely worth it.
Plus the recovery community is awesome!