What is LR?

You can try to memorize all the katakana and hiragana characters first if you have not do so. You can self study the kana characters as they are the most easiest and the simplest form in Japanese language.
Then, you can try to learn some low level kanji characters, by either with instructors' help or self study.

It all depends on your effort actually. If you spent more time in studying the language, you'll learn faster though.
But to play games in Japs... and given it FF or any jrpgs, it is quite hard actually as most of original jrpgs (untranslated) out there use kanji without any furigana...

Try to study and memorize the kana characters first in less than 1 month period.

furigana is kana characters which are used to spell/pronounce or overshadow the reading of kanji characters. Often used in manga and some reading materials.
Just wiki furigana and you'll understand more of it.