White noise generators, etc are also helpful. Endel is a great app for sleep (also for focus during the day).

Establishing habits and a schedule is probably most important though.

I would try a very low dose of melatonin 30 minutes before your desired sleep time, and go to bed at that time every night for a couple of weeks. The melatonin can assist you in shifting your circadian rhythm to the new schedule (see article I posted). Then, if you establish a decent sleeping pattern, you can wean off the melatonin to see if you are actually low on it.