I had sleep issues for years, almost failed high school because of it and then I was late to my own graduation. Now I have a routine that serves me well: Wake up and go to sleep at the same time every day, no caffeine, no sugar at night, nightlight on my monitors at night, listen to boring audiobooks with a sleep timer, don’t lay in bed watching TV.
I still think those classes are a myth, I never heard of anyone taking a civics class when I was in school 20 years ago.