chronotypes are real. But there's no type that stays up all night. You'll just get tired a few hours later and thus wake up a few hours later max.
Try getting enough sunlight during the day, avoid bright light after sundown. Sleep in total darkness. Maybe try a light therapy lamp for 15 minutes after wakeup in the morning. Avoid coffee during the day. Physical activity, even light one, helps a LOT.
You should notice a difference after 2-3 weeks. If in doubt, ask a doctor.