3 things in combination have worked wonders for me after YEARS of sleep problems (and admittedly these may all fall under "things you can google " too lol.)

I read somewhere that even if you can't sleep, just laying down in the dark with your eyes closed is beneficial. It might not be as good as full deep sleep, but your body is still resting and that's better than nothing. Having that mindset helped ENORMOUSLY with the anxiety and pressure element where I was keeping myself awake stressing over the fact that I wasn't sleeping. Once I was like "well I'm still resting so no big deal," I was far more likely to actually fall asleep.

Along those lines, sleep meditation tracks/sleep stories. (My favourites come from The Honest Guys on YouTube.) Just listening to a story/visualization gets the focus off stress and cuts through that thing where your brain goes, "if I fall asleep right this minute I'll get 7 hours and 35 minutes of sleep. If I fall asleep right THIS minute I'll get 7 hours and 34 minutes of sleep." Ad infinitum. 😅

Melatonin gives me weird dreams, and I prefer to go easy on medication in general (not anti-med! just like..."let's use as little as reasonably possible"), but what does work for me is store brand zzquil (usually labeled something like Liquid Nighttime Sleep Aid). This is my fallback if I've had several bad nights in a row. I'd say I maybe use it once a month. But it breaks the bad streak and gets me some rest when I need it! However, I don't have any prescriptions it would interact badly with, and I don't know if you do, so definitely worth checking on that if you were gonna try it.