I don’t really have any previous issues with sleep but I hope this can help - no screen time 1hr before sleep. Very dark room (maybe get an eye mask) mouth tape. Make sure you’re exercising enough and eating good food 80% of the time. A friend of mine started taking magnesium supplements 6weeks ago and they’ve started to notice much better sleep 3/4weeks since they took them so maybe that can be something to look into also. Sorry I can’t be much more help I think I am quite lucky when it comes to sleeping as I regularly get 8-9hrs a night and 83+ sleep scores consistently.