You are recognizing the problem and that is a good place to start. You are not alone.
I have that too. I got a diagnosis 3 years ago. I spoke with my doctor and I have a medical and psychiatric plan that is working for me. Speak with your medical doctor and see what is possible. Disclose your problem with alcohol, so the doctor knows.
ADHD is caused by deficits of dopamine and norepinephrine (adrenaline) in the brain. Both of these hormones serve as neurotransmitters, and the ADHD brain’s shortage of these hormones is what causes the inattention and/or hyperactivity so often observed in people with ADHD. (A shortage of neurotransmitters means little or no coordination between centres in the brain, and that means disorder and impulsivity: it’s like an orchestra with no conductor. Each individual musician is brilliant, but without a conductor there is disorder.)
Addiction is all about dopamine. Dopamine is the anticipation hormone and the “rush” of anticipation we get when we are romanticizing our addiction (“oh it would be so great, it would feel good” - that addict voice) feeds dopamine to the brain, which for the ADHD person is something the brain is very short on; that is why people with addictions are much more likely to have ADHD than the general population (people with ADHD tend to self-medicate with their addictions; at a relatively young age they accidentally find that their addictive behaviour has an effect on their ADHD, and that reinforces the addictive behaviour and thinking).
It is possible to find healthy life (which means sober life) with ADHD. It takes help from knowledgeable medical and psychological professionals, along with people who know about addiction recovery (like people on Talking Sober, and the groups and writers / podcasters here: Resources for our recovery). It is also worth learning about your ADHD. This YouTube channel (HowToADHD) is an excellent source for research-informed ADHD content:
And books by knowledgeable, science- and research-informed writers are good too. Ned Hallowell and Thomas Brown, both researchers and clinicians of ADHD, are excellent.
You can do it. The knowledge and guidance and accountability you need is out there.