My riding actually coincided with alcoholism. I moved out for the first time and began drinking beer every night and I started riding to work every day. When I began riding longer distance, the "recovery ales" started climbing in number to where I could drink 6-8 light beers before finally passing out or falling asleep. Every night.
I've recently quit/cut back (5 day then 2 beers, 15 days then 2 beers, two days then two more beers, 12 days and then 3 beers. This is after not going more than 1 day without in more than 4 years) and I know that alcohol is definitely something to stay away from. It affects my confidence and my behavior the next day.
When I began riding to work every day, the endorphins or adrenaline definitely helped get me out of a 2 year funk at work. All of the sudden, my passion was back, customer engagement and conversations with coworkers became positive again and I enjoyed my job.
Over time the negative effects of alcohol began to outweigh the positives of cycling as I drank more and more.
I would recommend riding more for transportation/errands to make it more productive. Alcoholism is serious and whatever works for you is great. Get a simple basket cage that can be easily removed from your bike for any trips less than 10 miles from your house. Maybe find a riding club and do some training rides to get some social benefit from the bike.
Congrats on sobriety, maybe check out /r/stopdrinking. A lot of folks there turn to exercise after they quit and they have good advice. They do recommend AA a lot.
Ps: I dont think it's possible to ride too much. It's possible to ride too hard and not recover properly, but I've done some insane long distance touring of over 10,000 miles, and if you take a constant-effort type of riding into it, you can ride all the day long once you build a base. Constant and steady effort also means that you will no longer see the "gains" eventually. Sure, your legs will be disproportionate, but fuck it. I'm a cyclist, that's what I value. The only thing I need my arms to do is to support my lightweight body so that my legs can do their work. It depends on what you value.