Just let it happen. At first it's difficult but other time your body adapt. Trust me I did it myself, I used to sleep like 5am now, I sleep around 11-12pm. Try your best to eliminate all light sources, it have improved my sleep a lot. A general rule that: Don't eat anything/heavy food 2 hours before sleep. Don't use your device before 30 mins of sleep. Sleep early.
Mhhh okay