What to do if i could not go to bed on-time. subsequently, waking up is as difficult for me. any tips on keeping a consistent sleeping pattern?

Behavior modifying: One place to start is practicing good sleep hygiene. Keep your sleep pattern consistently structured, avoid napping, use bed only for sleep or intimacy, and avoid lying in bed long periods without sleeping. If falling asleep is troublesome because of trouble turning off your thoughts, relaxation and imagery techniques are often helpful. For more help with these make an appointment with a therapist.

Wake up time: Be consistent with the wake up time, basically you have to fix the wake up time strictly on the weekend and weekdays regardless if you sleep through the night or not, no naps, also the second most important is the bedtime, no caffeinated drink 6 hours before the bedtime.