while you are waiting for your next review, I advise you to check out Elon.io, it’s a fully free website containing lessons on Japanese grammar, kana and kanji.
Each lesson contains some exercises which can be of several types:
- Reading hiragana/katakana/kanji
- Writing hiragana/katakana/kanji
- Translation of a word or sentence from English into Japanese
The exercises are repeated using a spaced repetition system such that you can focus on the exercises you are worst at, while at the same time never forgetting what you have learned.
In case you have any suggestions for improvements, please let me know.