Use one of the many free anki decks for grammar or mine Bunpro and make your own anki deck. I’m not sure if I am allowed to mention that option on these forums…
Bunpro has lots of nifty features but you probably don’t need those premium features to learn. If you need suggestions for anki decks then please ask.
Equally, you may feel that you need Wanikani currently but plenty (most) people learn kanji just fine without it.
I hope you find something that works - good luck.