Hi and Welcome,
I'm glad you decided to post, and that you are working on living a sober life.
I think you will find your depression medication will work much better, when you stop drinking. Alcohol is a depressant.
I understand your concerns about sharing your problem with your friends. For me, I chose to not tell people that I was stopping drinking. I felt that it was an intensely personal thing. Hopefully if you share with your friends, they will support you. You will also find lots of support here.