Everyone is different, but most of us experience some type of sleep issues. These will become normal too.
Getting 7-9 hours of sleep a day, even in two or more sleeping sessions is as effective for me. So some days I take an afternoon nap.
I found everything that Jerry said above to be true too.
I also used guided meditation and breathwork apps and youtube videos.
I tried different ones and kept a few links that worked well for me. Ranging from a few minutes to over an hour.
I have shared the shorter guided breathwork videos with others in recovery who lost loved ones. I use them when I understand things are going to be hard.
Reducing or eliminating caffeine and some sugar later during the day helps.
Some physical activity and then a warm/hot shower about an hour before bedtime are great.
Having your last meal over an hour before bedtime is good too.
Let us know what works for you too.