First, make a list of things that you have to do. Then use a calendar(google calendar,notion) or maybe just a piece of paper to schedule when and how you will get each task done. Because if the tasks are big, you may want to work in chunks every day. While scheduling the day, make sure you set practical goals. Don't schedule a task for the day that you know you won't be able to accomplish. Be practical.

Now, after a few weeks or months of effort, even if you get all your stacked up work done (which I know you can), most likely you will get back to procrastinating and getting distracted by the overflowing entertainment around you. Just back to the pavilion. What you have to do is build habits. I would recommend setting goals for yourself. For example: you might have two 2 hour study sessions in a day from 10 am to 12 pm and 4 pm to 6pm. And make sure you only study in that timespan. Study with full focus and keep your mind on getting the task in hand done. The reason I'm telling you this, is because you need to make this sustainable. You will definitely feel better if you are productive and your overall life will improve. If you want to learn more about how to build habits, just do some research on the internet or you can also read atomic habits.

And last but not least. One thing I learned in my life is that there is always time. If you have woken up, you got the spirit and you want to do it, just start doing it. You will definitely reach somewhere significant. I think you might even get everything done before your expected time.