You can do a few things to reset your sleep schedule!
Your sleep schedule is determined by your internal biological clock, also called your circadian rhythm (aka energy schedule), in addition to sleep pressure (i.e. aka sleep debt).
Here are simple actions you can take at specific times to help you shift your circadian rhythm:
See bright light right when you wake up, avoid bright/blue light 90mins before bed (even better, I'd highly recommend using these blue blocking glasses). Light is by far the biggest factor to reset you internal clock.
Drink caffeine at a low and slow pace to help keep you awake, avoid it 10hrs before bed, which is based on the half-life of caffeine.
Take melatonin—as low as 0.5mg—about 30mins before your target bedtime.
Take a nap, if you can, to help keep your sleep debt low. Avoid naps 8-10hr before your bedtime when possible.