well done!! even if it took you longer than you might have planed you are still part of the minority that pushed through and kept going (according to this cool post) !
i’m also about to level up to level 20 and the 死 levels (hopefully tomorrow) and i’m so excited ^-^
if you want to chat with other wanikani users taking an ‘eternity’ (and various speeds in between), the ‘lets durtle the scenic route’ forum has lots of nice friendly users encouraging one another 