Trying to get better sleep  

Getting more sunshine and fresh air is probably the easiest way and cheapest way. It doesn't always work for everyone. I find that when I am having sleeping issues, soaking in a bath with some epsom salt and making use of lavender-scented items helps a lot.

If you drink caffeine I would cut that out. Don't do it all at once, just cut back. You don't want to have withdrawals. It will help you sleep better when you don't have the stimulant in your body. 

I find exercise makes a difference. When I am more active, I sleep much better. Certain things can disturb your sleep like sleeping in a room that is too warm or too cold, or using the wrong pillows or matress. 

Make use of blue filters if you can. Use them on all your devices. I had trouble with sleep last year and noticed a huge difference when I switched to using blue light filters on my phone and computer. 

Someone told me that don't need to worry about those things still not happen yet. So try to clear your mind before going to bed

Magnesium might help. I know a lot of people who struggle with sleep are often deficient in magnesium. Try eating more nuts, seeds, and leafy greens like spinach. Or you can get topical magnesium in a spray or lotion.