I often study for really hard IT certifications and I found a method that works for me, basically is you need to commit with hours per day that you going to study, let's say 3hours per day, you need to commit to it weekly so you don't fall behind schedule then you start every day with studies when you start to lose attention and interest on the study subject don't push it, go and play like a comp or 30min, stop it and return to the studies, and repeat that until you meet your daily committed hours.
I found out that studying long periods of time doesn't do good unless you are 110% focused, now if you can't commit or balance them prolly you have a brain of a fish just keep playing Valorant and drop school, cheers.