I can totally relate to you.
You've already into the healing process as you understand that you're running away. Don't panic you'll get through it.
Just give yourself time to feel everything and study for atleast 1hr a day, you can switch off your mobile or whatever device you read manga. Take your time as it's really a hard to stop reading mangas and getting yourself motivated to study. You can also plan like when u complete a question you get some Xp like in manhwas and note it down whenever you level up in subjects. As time goes you feel like you're inside a manga and you got you're studies done and even you'll get some time to read mangas. My advice is that dont panic, just do everything at your own pace and dont rush.
P.S : I apologize for my grammatical errors as English is not my first language
Hope you have a good day :)