Welcome
I'm 25, though I quit when I was 24 too
it's a good age to do it!
I was the same as you - I didn't drink every day. I drank once or twice a month when I quit (I had drank more frequently in the past but due to realising my problem had tried to 'cut it down'), but every time I drank I drank to excess and made terrible mistakes. My mental and physical health were both really bad and I was in a really awful place.
I have alcoholism in my genes, too.
I used AVRT lots in the beginning and when I'm having difficulties, I still use it now. You can find tons of information on it on this website in the secular connections forum or you can search for it in Google. It's very, very helpful in understanding why we want to drink when we know it isn't good for us.
Wishing you all the best on your sober journey. Keep posting - it really does help!