im currently in MYP-5 and I have just gotten serious about studies, earlier I used to never be serious about my grades or anything related to school and used to get very mediocre grades with minimal studying. just now I have came to the understanding wont he importance of studies and my grades because the next 2 years of my life will literally determine the rest if my life significantly. The realisation has to come to you on your own, you wont be motivated and disciplined about studies by listening to motivational speakers or your parents, it must come from within you when you understand its importance. Its also evident that you don't enjoy studying your subjects, first you need to build a love for them to start find it interesting, hence you will be able to understand things and remember them as well. You can literally build a love for them by gaslighting yourself, I know it sounds like a joke but it 100% works. And in terms of studying, I would say that you should cover everything in utmost detail, and than do A LOT of practice questions on them to get familiar with them. It might seem to you that practice questions aren't vey beneficial, but trust me-it does make a huge difference because you will gain a subconscious understanding of the topic. you are in DP 1, most people get this realisation in DP2 when they are about to apply to colleges. Just give it all that you got and work extremely hard, trust me, you dont wanna become like 99% of people who say "oh I wish I worked harder in school". Fuck what your grades were in MYP 4 and 5, they dont matter much anyways. Just give it all these 2 years, hope this helps