One way go tuition, second is ask ur teachers to guide u. Hope u
understood what I meant. 其实，华文是很容易的。你只要补习就行了。but still depends
whether u understand, if don't know, ask ur teachers. It doesn't
matter if ur tuition classmates mock u or whatsoever, the important
thing is, u hv to learn what was taught. One important reminder,
also concentrate in ur other subjects too.
Wish u,
All the Best! for ur exams!