Perhaps the first advice I can give you to make your study more enjoyable is to ignore the fact that it is a study, and instead try to look at it as if it's information you like to know or at least “useful” to know. Duties are always hated and boring. Interesting and useful
My second advice is to deal with science with an open mind. If you have trouble understanding certain information in mathematics, for example, instead of saying “I'm not good at mathematics”, look online for simplified ways to help you understand the subject and overcome your problem, or find a friend who is good at mathematics to explain it to you. By his style
Here we get to the third advice: Find a friend who will share the study with you, with this friend being serious and committed. Studying with someone makes the periods of dismissal less. It also makes the lesson interactive and opens up a space for discussion and consolidation of information instead of merely studying matrix information next to each other.
Fourth advice; change your place of study. If you study in your room all the time and find it boring, try studying in a library or cafe. You may be surprised, but sitting in a crowded place sometimes helps to increase concentration and break the usual school office routine
My fifth and final advice is to use color and illustrative videos, and turn hard portfolio materials into charts and drawings, or even stories! Then take a break and reward yourself after every work you finish to the fullest, important was small and simple.
Good luck. I'll see you at the top.