Try making it a habit(Cue, Routine, Reward). After 3 decades on earth, I finally feel like I have a decent sleeping habit. Two things that worked for me, having a consistent schedule and creating a cue/trigger associated with sleep.

I started wearing ear plugs and facemask to sleep. I started wearing it because my partner usually sleeps much later than me. First couple night took some adjusting, but after a week or two. I realized something. I started falling asleep almost immediately after putting on the ear plugs and facemask. That's when I made the realization I unintentionally created a habit with the ear plugs and facemask as the cue.

Try Meditation. It really helps sleep quality.

Another thing is not drinking caffeine AT ALL. My sleep quality got much better after I stopped drinking coffee. Strangely I can drink as much tea as I want but coffee makes me sleep badly.

Sleep performance anxiety is a real thing. I’ve had to deal with similar issues. I try not to put too much weight when reading these studies (because they are anxiety inducing) and stick to a healthy bedtime wind-down routine as best as I can.

Check this out, might be helpful - https://insomniasos.net/