When I first got out on my own (and when I first got sober), I had trouble settling down to sleep at night because I was feeling FREE, and I had so many things I wanted to do.
One thing that helped me was a regular bedtime ritual. I'd climb into bed (I had nice new bedding and a comfy new mattress), with a good book (I used to love reading before bed), a cup of ice cream, and an iced tea (caffeine doesn't bother me but if it does, have decaf or a glass of water or something). And I'd read till my eyes were sleepy.
I still do that, and these days, it often takes about 15 minutes before my eyes are too heavy to keep reading and I go to sleep.
Routines and rituals often are very helpful for sleep problems.