I don't even know where to start. It has been the worst year of my life. I am currently in junior year of high school and I've taken STEM.

 Last year I lost lot of my relatives and I've been depressed since. I had no routine from since. I completely lost track of school and missed most of my classes which are still being held online. I watched a lot of YouTube and thought of it as a coping  mechanism to deal with work pressure. I had no idea of what I was doing. I tried a lot to come back to my daily routine many times but somehow I couldn't get back.
I started watching motivational videos and read a lot of stuff on mental health but nothing helped. Subconsciously I was writing what I watched &amp; read when I felt motivated because I had no one to speak to.

My friends got shuffled and many shifted to different schools so I almost talked to noone this year except my family lying everything was going well
I still am addicted to YT, I've deleted the app and reduced my subscriptions and still I get around 3h screentime.

My sleep cycle is also messed up, I sleep at 2am and wake up at 8pm and I've had almost no excercise this year and feel lethargic all the time.
My exams are within 2 weeks and I've studied almost nothing this whole year.
I was a topper in my class last year and when I look back I get so down.I've lost the ability to cry and I've given hope that I'd even pass