How can I study on sundays and other days free from school?

Hello there, I’ve always had a big issue when it comes to studying on days in which I don’t have school, which is bothersome, because I could get a lot more done.

Like, I wake up knowing that I don’t have school, but it’s time I can use to do just a little bit more, also because I don’t really go out that much and so I’d like to study, but it’s like 100 times harder than usual.

Maybe it’s related to my routine, idk, but it get me bummed out, because I don’t really have anything else to do, but I end up scrolling online every single time and barely get the bare minimum done, which could be problematic, because in a few moths I have to do my med uni entrance exam, which here in Italy is the TOLC-Med and I barely know anything. Sunday is almost always the only day in which I could be studying, but I don’t.

So, how can I manage my sundays better?