Not sure if I can do it

Long time lurker, first time poster. I've been drinking far too much for too long and I know I need to stop, but I'm not sure if I can. I've tried sobriety tracking apps, and first thing in the morning I think to myself, "this is the day! I'm going to get my life on track." Then the end of the day comes around and before I know it I'm at the liquor store and the cycle repeats.

I don't know what to do or how to do it. I just wish I had never taken that first sip. So I'm coming here for support.

Thanks friends