How do japanese people study for entrance exams?

I’m currently studying for the EJU so I wanted to ask this. Given that the EJU are similar to normal Japanese entrance exams, I want to ask what are some online resources that japanese people use to study for entrance exams? I of course also asked this question on quora.jp and 教えて go but no cigar yet 🙁 (any other sites I should ask this on?)

there are Past exam questions and I also ordered the official 2022 book from JASSO (which will take 3 WEEKS) but other than this I’m struggling to find anything.

I’ve also asked some of my study buddies but they’re already busy studying for it so no answer yet 😛

Is there any equivalent to say Khan Academy In japan?

Thank you 🙂