Since you’ve been gone for 1 year and are considering Kitsun, have we looked into Marumori.io instead?
I’m a team member of Kitsun & Marumori. We launched Marumori 1y ago in order to cover everything Japanese learning from Zero to Hero. There are grammar lessons & Grammar SRS, vocabulary and kanji SRS practice. We’ll also have vocabulary lists for thousands of light novels being out next week. Content-wise, everything is basically covered until N4 but we’ll continue working on N3+ content as well.
I think Marumori would make more sense for you over Kitsun