Welcome to the forum. I hope this community will be useful for you as you work toward your sobriety goals.
I would invite you to read around the forum, and make use of the search feature as well, since there are a lot of stories that people have shared over the years of which you may find to be useful. There are a lot of resources that have been shared as well.
You seem to have found out that occasional drinking won’t work for you. Having this knowledge through experience will be a valuable thing to mentally reference as you continue on.
I am also a pretty private person. I have tried a variety of “openness levels” on this forum over the years to figure out what is useful for me. I’m aware that some amount of sharing is good because it allows others to reach out to me as I reach out to them. I hope you will jump in to some of the threads (whether they are on alcohol or something beguine like pets) and test the waters. I very much believe that these ‘non-addiction’ threads are vital to building a sense of community where people can feel more comfortable sharing.
There is a daily check in thread that many people find to be useful in keeping themselves ‘on track’ that I would recommend if it interests you.
Again, welcome, and I wish you the best.