I would start by trying to sleep 15-20 earlier than I slept last night and keep that going for a week. This means I also start my bedtime routine earlier than I did last night. If I succeed, I will do it again for the next week and keep it up until I am sleeping at my desired sleep time.
I prepare an hour before I want to go to bed. I stretch, meditate, write in my journal and read. If I’m still having trouble, I listen to the sleep meditation. If that doesn’t work, melatonin.