Good for you, this is my chosen way of quitting, although my taper off whisky will be over quite a few days. I have gone from drinking 200-600ml down to 100ml from last Wendsday and so far so good. Each day has got better and better, felt great this morning. I had a bad night last Wendsday with hot sweats and lack of sleep my first night but since nothing much at all, this morning felt like my old self.
Take one step at a time, tread careful, good luck x