What and how are important questions to discover ways to improve your sleep.
So in the vid below.
You need to eat food with the appropriate melatonin and/or tryptophan.
https://www.ganjing.com/s/9eAQVGMGV
Sleep hygiene is a good idea.
As is light in the am.
Try to avoid extra water before bed and cut out coffee and alcohol.
It is a good idea to check with your doctor.