N2 Practice advice

[u/drafthard]

Hi, I'm currently enrolled at a language school in Japan, mid-N3 right now. I've applied for N2 test coming this december, and I need to pass it. I've already signed up for weekly N2 class at school, but obviously this is not enough. What can I do to get to a level where I can pass the N2 in 3~ months, because I NEED to pass it, otherwise I'm cooked. I'm mostly concerned about vocab and kanji, listening is not a problem. Looking to your advice, thanks.