First off - welcome to SR. Its a great site with lots and lots of information. The people here will support you.
As far as alcohol and whether you are an alcoholic or not I think only you can answer that. Where does that first drink take you? What consequences are there to your drinking? There's a list of questions somewhere around here and I am sure one of our very helpful moderators can point you in the right direction.
As far as drinking and moderating your intake, I tried that for years. I even switched what I was drinking. Never found anything that worked except abstinence. This site has been my support and these people have helped me through it. I would go to a meeting if that didn't work because I vowed that I would do anything but drink. I have nothing against meetings, but just decided to try this first.
Okay. I have talked way too long. Welcome again to SR and I hope you find lots of help and information to start you on your way.