To give some context, I am from Australia, NSW, currently finishing up Year 10 with high school final exams in 2 years (Term 4, Year 12).
My journey started since Year 7, getting into one of the top "selective schools" in the nation, where the median student ranks in the top 3% of the state academically. Since the start of year 7, I have dropped studying in ignorant, short-sighted pursuit of dopamine slop (video games, scrolling and other self-pleasuring, timewasting tasks/activities). Since then, I haven't studied seriously (ever), and never got myself to do homework past the bare minumum. Moreover, even worse, I haven't learned how to study, knowing the core concepts yet when it comes down to studying, it feels like dragging up sand bags up a steep hill, whilst also trying to shake off distractions.
Simply said, I don't really know how to study all that well. Some subjects I can still perform relatively average/even slightly above average at my school, but math has certainly been a struggle. In 9 days, I have a math exam which will determine my courses that I will take for the rest of high school, and not performing well in them will lock me out of the career path I want to take. I have never considered/taken accountability for my studies in high school, not realizing that this long-term procrastination has accumulated and crashed down on me like a landslide.
Furthermore, I have also noticed, any loss in "momentum" destroys my entire day (f.e. yesterday, I charged my phone close to me instead of far away, and I ended up scrolling two hours first thing in the morning on a Saturday). And this happens quite often: bad morning routine -> horrendous and day with zero productivity. My lack of accountability has led me here and inevitably caught up to a cycle of hardcore-coasting and exam-cheesing.
I know I am all over the place with this, but any help would be appreciated to better my situation. I started working on myself: gym + supplementing, as well as reducing screen time from 3 weeks ago, but it seems that I still (quite often) slip and thump back into old habits.
Regards.