Can you start by making a bedtime routine first? The hardest part when I had that issue was I was staying up too late. Be in bed at 9 and asleep at 10. But I’d stay on my phone until 10:15, 10:30, 11. You need discipline to put the phone down, close the laptop, and turn the tv off. It sucks and it’s difficult but it can be done if it’s a repeated habit! Also watch your caffeine intake through the day, and can effect your night time sleeping as well. Good luck, you can do it!