Here's how I fixed my procrastination from a fellow procrastinator! (a little bit it's still bad lol)
1) The best advice I can give you is to structure your time! Set study break alarms on your phone or with a timer, and give yourself a bunch of little 15 to 30-minute blocks of study time interrupted by 5 minutes of break time.
2) Once you're on a roll, you can increase the study time as to not interrupt your flow.
3) Tell yourself that procrastination isn't going to make time go away, it only prolongs your suffering and homework! Install study Chrome extensions that block distraction sites.
4) Have your parent check in with you every hour if they're available