Hi, Mary-
I had insomnia at first, too. It's an adjustment for our bodies to fall asleep naturally instead of passing out from drinking (at least this is how I fell asleep every night).
It will get better. I grabbed naps when possible, which helped and my sleep evened out after a few months.
Congratulations on your decision to quit drinking. My life as a sober wife and mother is so much easier and happier than when I was drinking every night. You can do this!