hey guys

ive started learning japanese in school again after a year off, but i havent remembered anything! well, i remember my hirigana and katakana
and a fair amount of kanji
but in terms of grammar ? NONNNE
so basically i had to write a report today in japanese, and i ended up with a 12/20 cause my grammar was shit
and i have an exam in 6 months. fuckkk

so what im asking is
do any of you guys know where i can basically start from scratch with this shit ?
cause i need to learn scentence structures, grammar and how to put scentences together when they are in a different form (ie. past, present e.t.c)

id also appreciate it if someone kind of told me how to approach this in such a small length of time. I need an A on this if i want to get into a good uni so pleeease it would be fantastic if someone posted exactly what i should learn and in what order i should learn it in.
I have about 2 hours a night to spend working on it and more on the weekends.

THANKKS !

get your self a text book. I used wakatta for school, it was good, full of grammar points. Just bang them out. Write new things every day and incorporate all of the things that you have taught yourself so your writing is continually advancing. When you get to the end of the textbook your grammar will be really good, and youll be writing like a pro again.

Dude you have time. 6 months is quite a while to learn.